800.528.4490

Tanzanian Umba Sapphires & Rubies

Orange, Peach, Red, Pink, Blue, Purple, Green, Gray, Greige, Yellow, Bi-Color, Color-Changing...Soft pastel tones to vibrant rich hues

Umba Sapphire known for its vast array of fancy colors unique to this Tanzanian valley. All natural and untreated.

NAFCO Gems affiliation with African Umba Sapphires and rubies dates back to the early 1960's when George Papaeliopoulos, a farmer / miner living in Africa, discovered a sapphire (corundum) deposit near the Umba River in Tanzania.

Mr. Papaeliopoulos was looking to sell the 'tons' of Umba sapphire and ruby rough he was mining when he met Eugene Naftule. The Naftule family was so interested in this 'new find' that they made an exclusive agreement to purchase ALL of the quality rough being mined by George and began cutting in their Geneva, Switzerland and Shannon, Ireland lapidary facilities.The Naftule family was the only and largest supplier of Umba Sapphires world-wide. Mining continued until 1972 when it was nationalized

Today because of our family's foresight and investment in some of the most rare, unique and untreated sapphires-- the Umba Sapphire-- NAFCO continues to regularly cut and still has the largest quantity of material today.

 



We have a wide selection of un-treated Orange sapphire melee available, ranging in various shades from light yellow-orange or peach colors to salmon color, and even intense reddish-orange African Padparadscha sapphire melee. These orange sapphires are in
Diamond Cut Round Untreated Orange Sapphire Melee Sapphires ( 1 mm + )
Add to Inquiry
We have a limited and precious collection of unheated, untreated mixed golden peach-orange sapphire baguette melee. These exquisite baguettes measure 3 x 1.5 millimeters and feature a delightful step-cut. Sourced from the rare and sought-after Umba River
Loose Untreated Pastel Golden Orange Sapphire Melee Baguettes
3 x 1.5 x 0
Add to Inquiry
Multi color untreated sapphire in princess cut squares. These square sapphires are natural untreated sapphires and come in many earthy colors and organic shades such as pastel pinks, rose sapphires, baby blue sapphires, peach sapphire<br><br>We offer a st
Princess Cut Square Fancy Color Unheated Sapphire Melee 1.9 mm & up
Add to Inquiry
Our exquisite collection of untreated sapphire in buff top baguettes. These unique Umba baguette sapphires are completely natural and have not undergone any treatment, preserving their inherent beauty. The gemstones are available in various sizes, providi
Loose Untreated Fancy Color Umba Buff-Top Baguette Sapphire Melee
Add to Inquiry
Multi color untreated sapphire in buff top squares. These Umba square sapphires are natural untreated sapphires and come in various sizes and many earthy colors such as pastel piWe are delighted to offer a rare and exceptional selection of untreated sapp
Loose Buff -Top Square Untreated Fancy Color Umba Sapphire Melee
Add to Inquiry
We have a captivating collection of untreated sapphire cabochon ovals in various sizes. These beautiful gemstones originate from the Umba River region of Tanzania and are completely natural and unenhanced. The assortment includes a wide range of colors an
Loose Untreated Oval Umba Sapphire Cabochons - Natural Unheated Colors Sapphire Oval Cabs
Add to Inquiry
Exquisite collection of natural untreated sapphire baguettes, measuring 4 x 2mm in size. These step-cut baguette sapphires showcase a captivating array of earthy colors and organic shades, including pastel pinks, rose sapphires, baby blue sapphires, peach
Loose Baguette Untreated Fancy Color Umba Sapphire Melee (4 x 2 mm)
4 x 2 x 0
Add to Inquiry
We have a selection of exquisite, round sapphires from the Umba River area in Tanzania. These sapphires possess a diamond-like brilliance and come in a variety of delicate pastel hues. They are in their natural, untreated state, retaining their original b
Diamond Cut Round Untreated / Unheated Pastel Sapphire Melee 1.5 mm +
Add to Inquiry
A diverse range of multi-color calibrated round untreated sapphires. These sapphires are natural and unheated, preserving their organic and earthy hues. The collection features a beautiful array of colors, including pastel pinks, rose sapphires, baby blue
Round Diamond Cut Untreated / Unheated Umba Sapphire Melee 1.3 mm +
Add to Inquiry
Loose multi-color untreated sapphire triangle melee from Africa. These rare unheated triangle Umba sapphires come in a variety of sizes starting from 3 mm up to 5 mm and<br><br>We are thrilled to present our exclusive collection of loose, untreated sapphi
Loose Untreated / Unheated Sapphire Triangles Melee 3 mm & up
Add to Inquiry
Captivating collection of multi-color untreated sapphire cabochons, available in assorted shapes and sizes. Each cabochon features a natural and untreated sapphire, showcasing its authentic beauty. Our selection includes a diverse range of colors and shad
Untreated / Unheated Umba Sapphire Cabochons Colorful Sapphires 4 mm +
Add to Inquiry
Square Umba unheated sapphire suites made to order in natural earthy tones or mixed in multi color sapphire suites. We stock princess cut square untreated Umba sapphire melee in every color sapphire typical of this African sapphire material such as peach
Princess Cut Square Untreated / Unheated Umba Sapphires for Suites
Add to Inquiry
Round Umba sapphire suites made to order in single color sapphire suites in the muted earthy tones or mixed in multi color sapphire suites for custom designs. We stock diamond cut round untreated Umba sapphire melee in every color sapphire typical of this
Diamond Cut Round Untreated Multi Color Umba Sapphire Melee
Add to Inquiry
Rare oval untreated multi-color rose cut sapphires. These sparkling rose cut sapphires from the Umba Valley Region of Tanzania are well cut with a completely flat bottom and checkerboard style facets on the dome top. Nice transparent unheated rose-cut sap
Loose Untreated Multi-Color Rose Cut Umba Sapphires - Unheated Rose-Cut Sapphire Ovals in many Colors & Sizes
Add to Inquiry
Natural Unheated emerald-cut orange sapphire from the Umba River Valley in Africa. This genuine untreated sapphire has lively copper undertones.
Loose Unheated/ Untreated Emerald-Cut Orange Sapphire
4.5 x 3.7 x 2.4
0.43ct
Add to Inquiry
Oval natural unheated orange sapphire from the Umba River Valley in Africa. This lovely orange sapphire has reddish undertones.
Natural Oval Orange Sapphire - Unheated / Untreated Orange Sapphire from Umba
5 x 3.9 x 2.6
0.45ct
Add to Inquiry
Unheated rectangle emerald-cut orange sapphire from the Umba River Valley in Africa. This natural orange sapphire has copper under tones.
Emerald-Cut Natural Orange Sapphire- Untreated Lively Orange Umba Sapphire
5.5 x 3.6 x 2.3
0.46ct
Add to Inquiry
Oval unheated orange sapphire from the Umba River Valley in Africa. This sapphire is bright and lively.
Untreated Oval Orange Sapphire - Unheated Orange Sapphire Oval
5.3 x 3.4 x 2.7
0.46ct
Add to Inquiry
Unheated round orange sapphire from the Umba River Valley in Africa. This natural orange sapphire is very bright with red undertones.
Loose Round Natural Orange Sapphire - Untreated Orange Umba Sapphire Round
4.4 x 4.4 x 3.1
0.50ct
Add to Inquiry
Square Cushion unheated natural orange sapphire from the Umba River Valley. This sapphire is bright and lively.
Natural Untreated / Unheated Orange Sapphire Loose Square Cushion
4.2 x 4 x 2.9
0.51ct
Add to Inquiry
Pear shape unheated orange sapphire from the Umba River Valley in Africa. This sapphire has bright flashes of peach and copper.
Loose Untreated / Unheated Umba Red Orange Sapphire Pear Shape
6.2 x 3.6 x 2.7
0.52ct
Add to Inquiry
Unheated oval orange sapphire from the Umba River Valley in Africa. This sapphire has lively copper tones.
Loose Oval Natural Orange Sapphire - Untreated Orange Umba Sapphire Oval
5.4 x 4.1 x 2.7
0.54ct
Add to Inquiry
Oval unheated orange sapphire from the Umba River Valley in Africa. This genuine untreated sapphire has deep reddish overtones.
Loose Unheated / Untreated Oval Orange Sapphire
5.4 x 3.9 x 3.1
0.59ct
Add to Inquiry
Radiant baguette unheated orange sapphire from the Umba River Valley in Africa. This untreated orange sapphire rectangle baguette is lively with flashes of copper.
Loose Untreated / Unheated Orange Sapphire Baguette Rectangle
5.7 x 3.4 x 2.7
0.61ct
Add to Inquiry
Emerald cut orange sapphire from Africa. This sapphire is unheated. It is predominately red in tone with flashes of orange.
Loose Emerald-Cut Untreated / Unheated Orange Sapphire
5.4 x 4.2 x 2.4
0.63ct
Add to Inquiry
Emerald-cut unheated orange sapphire from the Umba River Valley in Africa. This sapphire has deep reddish undertones.
Loose Natural Emerald-Cut Orange Sapphire - Unheated E/C Orange Sapphire from Umba
5.3 x 3.8 x 2.8
0.64ct
Add to Inquiry
Natural untreated oval ruby. This slightly roval unheated ruby is from the Umba River region of Tanzania. Nice lively rich red with crimson undertones.
Loose Oval Natural Untreated Ruby - Roval Unheated Ruby
5.6 x 4.9 x 3
0.68ct
Add to Inquiry
Oval natural orange sapphire from Africa. This nicely cut orange sapphire is unheated / untreated and has vibrant reddish/orange color.
Natural Untreated Oval Orange Sapphire from Umba
6.1 x 4.4 x 2.9
0.72ct
Add to Inquiry
Baguette untreated purple sapphire from the Umba region of Africa has rich purple violet color and well cut.
Loose Baguette Untreated Purple Sapphire  - Unheated Violet Sapphire Baguette
6.1 x 3.8 x 2.9
0.72ct
Add to Inquiry
Emerald-cut unheated orange sapphire from the Umba River Valley in Africa. This sapphire has deep rich red overtones.
put a title here
5.9 x 3.7 x 3.1
0.76ct
Add to Inquiry
Unique rectangle cabochon untreated  bluish purple sapphire  from the Umba region of Africa. This rich violet baguette sapphire cab has a super yummy grape color with a sugar loaf style top.
Loose Rectangle Untreated Blue Purple Sapphire Cabochon - Unheated Violet Umba Sapphire Cab Baguette
5.9 x 4.4 x 2.7
0.76ct
Add to Inquiry
This is a lovely unheated rectangular baguette orange sapphire from the Umba River Valley in Africa. This orange sapphire is well-cut and is very lively.
Untreated Rectangle Baguette Orange Sapphire
7 x 3.7 x 2.6
0.80ct
Add to Inquiry
Oval orange sapphire from Africa. This natural orange sapphire is unheated or untreated and has brownish undertones.
Loose Oval Orange Sapphire Natural Untreated
5.6 x 4.5 x 3.4
0.80ct
Add to Inquiry
Untreated oval purple sapphire is very lively and has a beautiful violet hue. Very pretty, well cut from Umba.
Loose Oval Purple Sapphire - Unheated Violet Sapphire
6.1 x 4.7 x 3.4
0.85ct
Add to Inquiry
Oval orange sapphire from Umba River region of Tanzania, Africa. This sapphire is unheated. It is a deep orange color with copper flashes.
Untreated Oval Orange Sapphire - Natural Unheated Orange Sapphire
6 x 4.7 x 3.5
0.88ct
Add to Inquiry
Lively pear shape rose pink sapphire. This bright untreated pink sapphire has rose wine undertones and is sparkling. Perfect for a alternative bridal or a custom unheated pink sapphire ring!
Loose Pear Shape Untreated Rose Sapphire - Unheated Pear Shape Pink Sapphire from Umba
6.7 x 5 x 3.8
0.88ct
Add to Inquiry
Natural untreated gray blue teal marquise sapphire. This bright unheated Tanzanian sapphire is from the Umba River region of Africa. The color of this well cut unheated teal sapphire is very unique yet very typical of the Umba region as it has notes of mu
Loose Marquise Untreated Gray Blue Teal Sapphire from Umba
7.9 x 4.3 x 3.1
0.90ct
Add to Inquiry
Pear shape unheated orange sapphire from the Umba River Valley in Africa sometimes referred to as African padparadscha. This orange sapphire is bright with flashes of gold and pink.
Loose Unheated Pear Shape Orange Sapphire
8.1 x 4.8 x 3
0.94ct
Add to Inquiry
Oval African orange sapphire from the Umba region. This sapphire is unheated. It is a lively peachy/orange sapphire color  sometimes called padparadscha color.
Loose Unheated Oval Orange Sapphire
6.3 x 4.6 x 3.7
0.96ct
Add to Inquiry
Pair of pear shape unheated orange sapphires from the Umba River Valley in Africa. These sapphires have pink/reddish tone.
Loose Matched Pair of Pear Shape Untreated Orange Sapphires
6.1 x 3.7 x 2.6
0.97ct
Add to Inquiry
Natural untreated trillion orange sapphire from the Umba River Valley in Africa. This super lively unheated orange sapphire trillion has bright flashes of orange and peach. If you need an one carat orange sapphire triangle shape this one is a beauty!
Loose Untreated Orange Sapphire Trillion - 1 Carat Trillion Orange Sapphire
5.6 x 5.4 x 3.8
0.97ct
Add to Inquiry
Sparkling antique cushion lilac purple sapphire. This natural unheated light purple sapphire is from Umba is lively.
Loose Cushion Unheated Lilac Sapphire - Antique Cushion Untreated Purple Sapphire
5.7 x 5.3 x 3.7
1.01ct
Add to Inquiry
Emerald-cut natural orange sapphire from Africa. This orange sapphire is unheated. It is a lively, bright stone with pink red undertones.
Loose Unheated Emerald-Cut Orange Sapphire
5.7 x 4.9 x 3.6
1.03ct
Add to Inquiry
Genuine pear shape untreated orange sapphire from Africa. This unheated sapphire has a deep orange color with flashes of gold.
Loose Pear Shape Orange Sapphire
7.9 x 4.9 x 3.5
1.05ct
Add to Inquiry
Pair of unheated baguette orange sapphires from the Umba River Valley in Africa. These lively rectangle pair of sapphires are very bright with orange peach tones.
Pair of Unheated / Untreated Orange Sapphire Baguettes
5.5 x 3.6 x 2.3
1.05ct
Add to Inquiry
Square emerald-cut natural orange sapphire. This orange sapphire is a vibrant with some pink and golden undertones - some refer color as African padparadscha It is an unheated orange sapphire from the Umba River Valley in Africa.
Loose Unheated Square Emerald-Cut Orange Sapphire
5.2 x 4.9 x 4
1.06ct
Add to Inquiry
Oval natural orange sapphire. This orange sapphire is unheated / untreated. It is a lovely burnt orange shade with golden flashes.
Loose Unheated Oval Orange Sapphire
6.8 x 5 x 3.4
1.16ct
Add to Inquiry
Pear shape unheated orange sapphire from the Umba River Valley in Africa sometimes referred to as African padparadscha. This nice orange sapphire is a buff top cut pear shape with flashes of gold and pink.
Loose Buff Top Pear Shape Unheated Orange Sapphire
8.6 x 5.6 x 3.4
1.24ct
Add to Inquiry
Oval African padparadscha color orange sapphire. It is unheated /untreated. This sapphire is predominately pink and peach in color with orange undertones.
Natural Oval Padparadscha Color Orange Sapphire - Untreated Oval Orange Sapphire
8 x 5.1 x 3.2
1.25ct
Add to Inquiry
Oval unheated orange sapphire from the Umba River Valley in Africa. This sapphire copper tones in it.
Unheated Oval Orange Sapphire - Natural Untreated Orange Sapphire from Umba River
7.5 x 4.9 x 3.7
1.28ct
Add to Inquiry
Natural unique untreated African ruby.  This well cut oval unheated ruby is from the Umba River region of Tanzania.  Nice lively rich red with Madeira undertones.
Loose Natural Untreated Ruby - Rare Oval Unheated  African Ruby
7.4 x 5.1 x 3.6
1.29ct
Add to Inquiry
Pair of trillion shape unheated orange sapphires from the Umba River Valley in Africa. These lively sapphire trillions are very bright with golden apricot tones.
Pair of Unheated / Untreated Orange Sapphire Trillion Pair
5.3 x 5.3 x 3.2
1.36ct
Add to Inquiry
Lively natural unheated orange sapphire heart.  This beautiful and rare heart shape orange sapphire aka African padpardscha is from the Umba Valley region of Africa and has sparkling golden undertones.
Loose Untreated Heart Shape Orange Sapphire
7 x 6.3 x 3.9
1.36ct
Add to Inquiry
Natural untreated round organic color gray sapphire.   This super brilliant Tanzanian sapphire is from the Umba River region of Africa. The color of this well cut unheated sapphire is very unique yet very typical of the Umba region as it has notes of
Loose Round Untreated / Unheated Gray Sapphire (6.8 mm)
6.8 x 6.8 x 4.4
1.40ct
Add to Inquiry
Oval orange sapphire from Africa. This orange sapphire is unheated / untreated. It has predominately a deep orange color with flashes of amber.
Loose Unheated Oval Orange Sapphire
7.7 x 5.4 x 3.5
1.40ct
Add to Inquiry
Oval natural unheated orange sapphire from the Umba River Valley in Africa. This lovely rare orange sapphire from our Bottoms Up Rose Cut series has reddish undertones and would be lovely set straight up or bottoms up.
Oval Bottoms Up Rose Cut Untreated Red Orange Umba Sapphire
8.6 x 6.3 x 2.7
1.41ct
Add to Inquiry
Striking natural untreated heart shape orange sapphire with deep red orange undertones. This beautiful and rare orange sapphire is from the Umba Valley region of Africa and just a clean, nice heart shape sapphire.
Loose Heart Shape Untreated / Unheated Orange Red Sapphire
7.6 x 6.4 x 3.6
1.44ct
Add to Inquiry
Marquise shape orange sapphire from Africa. This sapphire in unheated. It is a deep reddish/orange full of life.
Loose Unheated Marquise Orange Sapphire - Orange Red Sapphire Marquise
12.9 x 4.7 x 3.3
1.58ct
Add to Inquiry
Natural untreated oval neutral color very pale yellow sapphire.   This super brilliant Tanzanian sapphire is from the Umba River region of Africa. The color of this well cut unheated sapphire is very unique yet very typical of the Umba region as it h
Loose Untreated Very Light Yellow Sapphire - Unheated 1.50+ Umba Oval Sapphire from Tanzania
8.2 x 6.2 x 4.3
1.60ct
Add to Inquiry
Natural untreated peach sapphire. This oval buff-top salmon orange sapphire is from the Umba River region of Africa and is very unique and well-cut with its cabochon top and faceted bottom.
Untreated Oval Peach Sapphire Buff-Top - Oval Cab-Top Salmon Orange Sapphire
8 x 6.1 x 4
1.62ct
Add to Inquiry
Rich oval sparkling Beaujolais pink sapphire. This pretty untreated pink sapphire has bright with flashes of plum, wine and rose undertones. Perfect for a alternative unheated pink sapphire ring!
Loose Oval Untreated Umba Plum Pink Sapphire
7.7 x 6.2 x 4.2
1.66ct
Add to Inquiry
Rare 7 mm round untreated chartreuse yellow sapphire rose cut. This lively yellow rose cut sapphire from the Umba river valley in Tanzania is well cut with a completely polished flat bottom and fully faceted cabochon dome top. Check out our other colors 
Loose Round Rose Cut Untreated Chartreuse Yellow Umba Sapphire
7 x 7 x 3.4
1.76ct
Add to Inquiry
Elongated natural unheated ruby cushion.  This untreated rectangular cushion ruby has a nice deep red color. Clean Ruby slightly shallow so faces up larger.
Loose Natural Red Ruby Cushion
8.7 x 6 x 3
1.76ct
Add to Inquiry
Natural cushion unheated orange sapphire from the Umba River Valley in Africa. This orange sapphire has notes of cognac with gold and brown undertones.  This untreated orange sapphire is well cut bright and lively.
Loose Cushion Untreated Orange Sapphire - Unheated Orange Umba Sapphire
7.7 x 6.8 x 3.9
1.82ct
Add to Inquiry
Natural unheated fiery oval orange sapphire. This intense color reddish orange sapphire is super lively  and untreated!  This is a beauty!!
Loose Oval Unheated / Untreated Intense Reddish Orange Sapphire
8 x 5.9 x 4.3
1.82ct
Add to Inquiry
Lively oval untreated African apricot peach sapphire. This brilliant light to medium pink peach  sapphire is unheated . This sapphire is predominately pink and orange peach in color. Perfect for a peach sapphire ring!
Loose Natural Oval Untreated / Unheated Peach Sapphire
8.8 x 5.8 x 4.1
1.87ct
Add to Inquiry
Natural untreated oval sapphire with slight color change from champagne gray to  verbena green. This brilliant Tanzanian sapphire is from the Umba River region of Africa. The color of this well cut unheated sapphire is very unique yet very typical of th
Loose Oval Untreated Verbena Green Sapphire with Gray Undertones
8.6 x 6.3 x 4.1
1.94ct
Add to Inquiry
Natural untreated marquise greige sapphire. This bright unheated Tanzanian sapphire is from the Umba River region of Africa. The color of this well cut unheated gray sapphire is very unique yet very typical of the Umba region as it has notes of muted past
Loose Marquise Untreated Greige Gray Sapphire from Umba
11 x 5.5 x 4.3
1.99ct
Add to Inquiry
Natural untreated oval sapphire with slight color change from champagne  to  gray greige. This brilliant Tanzanian sapphire is from the Umba River region of Africa. The color of this well cut unheated sapphire is very unique yet very typical of the Umba
Loose Oval Untreated / Unheated Greige Gray Umba Sapphire
8.5 x 6.5 x 3.9
2.02ct
Add to Inquiry
Natural untreated oval sapphire with slight color change from gray to an organic verbena green. This Tanzanian sapphire is from the Umba River region of Africa. The color of this well cut unheated sapphire is very unique yet very typical of the Umba reg
Loose Oval Untreated / Unheated Gray Sapphire From Tanzania
8.5 x 6.5 x 4.3
2.05ct
Add to Inquiry
Natural untreated oval gray sapphire. This bright Tanzanian grey sapphire is from the Umba River region of Africa. The color of this well cut unheated Umba sapphire is very unique yet very typical of the region as it has notes of muted pastel tones.
Loose Oval Untreated Gray Sapphire
8.5 x 6.4 x 4.5
2.08ct
Add to Inquiry
This pretty and lively buff-top cushion shape natural untreated green teal sapphire is from the Umba River region in Tanzania. This cabochon top and faceted bottom teal sapphire has a soft color palette yet stays neutral organic tones.
Loose Buff-Top Cushion Untreated Teal Green Sapphire
7.6 x 6.7 x 4.7
2.10ct
Add to Inquiry
Rare 8 x 6 oval untreated orange sapphire rose cut. This rose cut orange sapphire is well cut with a completely flat bottom and fully faceted on its cabochon dome top. Unique lively color sapphire as it picks up tones of peach and reds!
Oval Rose Cut Unheated Orange Umba Sapphire
8 x 6 x 3.8
2.11ct
Add to Inquiry
Natural untreated oval gray sapphire. This bright Tanzanian grey sapphire is from the Umba River region of Africa. The color of this well cut unheated Umba sapphire is very unique yet very typical of the region as it has notes of muted pastel tones.
Loose Oval Untreated Gray Sapphire
8.5 x 6.5 x 4.2
2.11ct
Add to Inquiry
2 + carat emerald-cut untreated army green sapphire is from the Umba River region of Tanzania in Africa.  This lively unheated rich olive emerald-cut green sapphire is cut well in a traditional step-cut. Pretty and Rare!
Loose Oval  2 + carat Emerald-Cut Unheated / Untreated Green Sapphire
9 x 6 x 3.4
2.12ct
Add to Inquiry
Nice clean untreated oval red ruby cabochon from Tanzania. This unheated ruby cab has a rich red color.
Loose Oval Untreated / Unheated Ruby Cabochon
7.9 x 6.3 x 3.9
2.14ct
Add to Inquiry
Sparkling marquise rose pink sapphire. This bright untreated pink sapphire has rose wine undertones and is a BEAUTY. Perfect for a alternative bridal or a custom unheated pink sapphire ring!
Loose Marquise Untreated Rose Sapphire - Unheated Marquise Pink Sapphire from Umba
10.7 x 5.9 x 4.5
2.14ct
Add to Inquiry
Rare Umba Sapphire with slight color change.  This pear shape sapphire in daylight is a light taupe smokey color and in fluorescent light becomes a pastel lavender color.  Very lively and pretty untreated sapphire from Africa.
Loose Untreated Umba Sapphire - Pear Shape Color Change Sapphire 
9.7 x 6.8 x 4.3
2.16ct
Add to Inquiry
Super WOW mandarin orange sapphire. This orange sapphire is very lively and clean. It is an intense orange oval sapphire with fiery brilliance and full of life!
Loose Pear Shape Mandarin Orange Sapphire 3 + carats
10.3 x 6.8 x 5.4
2.55ct
Add to Inquiry
This lively buff-top cushion shape natural untreated light olive sapphire is from the Umba River region in Tanzania. This cabochon top and faceted bottom yellowish green sapphire has an earthy sun kissed color palette.
Loose Buff-Top Cushion Untreated (Greenish Yellow) Olive Sapphire
7.7 x 7.7 x 5.2
2.65ct
Add to Inquiry
Very brilliant oval untreated yellow sapphire. This light yellow sapphire is well cut and has lots of life.  Super Sparkly diamond like yellow sapphire from Umba.
Loose Untreated Yellow Sapphire Oval- Lively Light Yellow Oval Sapphire
9 x 7 x 5.4
2.70ct
Add to Inquiry
Rare 9 x 7 oval untreated yellow green sapphire rose cut.  This lively green yellow rose cut sapphire is well cut with a completely flat bottom and checkerboard style facets on it's cabochon dome top.  Nice transparent rose cut sapphire for many
Loose Oval Rose Cut Untreated Umba Yellow Green Sapphire 9 x 7
9 x 7 x 3.7
2.72ct
Add to Inquiry
Untreated light gray sapphire freeform slab.  This natural Umba sapphire hexagon slice in the gray tones is fully high polished and has a beveled facet girdle.  A one-of-a-kind natural sapphire.
Loose Umba Untreated Light Gray Sapphire Hexagon Slab/Slice
9 x 9 x 2
2.83ct
Add to Inquiry
Rare bright untreated 8 mm round green sapphire. This nice mossy green sapphire with blue gray undertones changes color in different lighting.  As seen in the 3 photos.  This unheated green sapphire is quite unique and has an organic vibe to it.
Loose 8mm Round Green Sapphire - Unique Untreated Green Sapphire with Color Change
8.1 x 8.1 x 5.7
3.04ct
Add to Inquiry
This over 3 carat oval shape natural untreated green sapphire is from the Umba River region of Tanzania in Africa.  This lively unheated pistachio or olive green sapphire has a soft organic color palette.
Loose Oval Unheated 3+ carat Green Umba Sapphire - Natural Untreated Martini Olive Color Sapphire
10 x 7.5 x 4.9
3.10ct
Add to Inquiry
Untreated blue sapphire freeform slab.  This natural geometric Umba sapphire slice is fully high polished and has a beveled facet girdle.  A one-of-a-kind natural sapphire beauty!
Loose Untreated Blue Sapphire Freeform Slab/Slice
10.7 x 7 x 2.7
3.22ct
Add to Inquiry
This over 3.25 carat oval natural untreated chartreuse color sapphire is from the Umba River region of Tanzania in Africa. This lively unheated greenish yellow sapphire has a soft organic color palette.
Loose Oval Unheated 3.25+ carat Greenish Yellow Umba Sapphire - Natural Untreated Chartreuse Sapphire
11.6 x 7.5 x 4.7
3.26ct
Add to Inquiry
Lively 3 + carat unheated oval green sapphire from the Umba River region of Tanzania in Africa.  This rare untreated green sapphire oval is well cut and  has a slight color change with natural light. 
Loose Large 10 x 8 Oval Unheated Green Sapphire - Natural Untreated Oval Green Sapphire 
10 x 7.9 x 4.4
3.43ct
Add to Inquiry
Natural unique untreated African ruby cabochon.  This well cut oval unheated ruby cab is from the Umba River region of Tanzania.  Nice lively rich red with ruby port undertones.
Loose Natural Untreated / Untreated Ruby Cabochon
11.3 x 6.6 x 4.5
3.62ct
Add to Inquiry
Untreated pink sapphire freeform slab.  This natural geometric pink peach Umba sapphire slice is fully high polished and has a beveled facet girdle.  A one-of-a-kind natural sapphire beauty!
Loose Untreated Pink Sapphire Freeform Slab/Slice
14.5 x 10 x 2.5
4.04ct
Add to Inquiry
Natural untreated round rose-cut black sapphire from the Umba River region in Tanzania.  This unheated black sapphirerose cut with faceted culet bottom is very reflective and in certain light reveals brown highlights.  Rare and Unique!
Loose Round Rose-Cut Untreated Umba Black Sapphire
9 x 9 x 7
4.44ct
Add to Inquiry
Unique untreated oval purple sapphire cabochon from the Umba River of Africa.
Loose Oval Purple Sapphire Cabochon - Untreated Purple Oval Sapphire Cab
10.5 x 8 x 5.3
4.76ct
Add to Inquiry
Rare 11 x 9 oval untreated organic teal sapphire rose cut. This rose cut sapphire is well cut with a completely flat bottom and checkerboard style facets on its cabochon dome top. Unique color sapphire as it picks up tones of blues, greens, grays!
Oval Rose Cut Unheated Teal Sapphire - Untreated Umba Rose-Cut Blue Sapphire
10.8 x 8.7 x 4.8
5.06ct
Add to Inquiry
This lively buff-top cushion shape natural untreated chartreuse yellow sapphire is from the Umba River region in Tanzania.  This cabochon top and faceted bottom rich greenish yellow sapphire has an earthy sun kissed color palette and is cut in a way
Loose Buff-Top Cushion Rose-Cut Untreated Chartreuse Yellow Sapphire
11.5 x 10.2 x 5.7
6.20ct
Add to Inquiry
Oval orange sapphire from Umba River region of Africa. This large rich orange sapphire has intense reddish undertones and is well cut and lively.  Beautiful and rare large orange sapphire.
Loose Large Oval Orange Sapphire - Natural 8 carat Orange Sapphire
12.3 x 9.7 x 7.8
7.91ct
Add to Inquiry
Natural untreated  color orange sapphire.  This oval buff-top sapphire is from the Umba River region of Africa and is very unique and with color saturation.
Untreated Oval Orange Sapphire Buff-Top - Large Buff-Top Umba Sapphire
16 x 10.1 x 6.5
8.48ct
Add to Inquiry
This large 9 carat oval shape natural untreated green sapphire is from the Umba River region of Tanzania in Africa.  This rare unheated blue green sapphire has a soft color palette yet stays neutral in the cooler gray tones with an almost bicolor loo
Loose Large 9 ct Oval Untreated Blue Green Sapphire
13.4 x 10.5 x 7.3
9.00ct
Add to Inquiry
Good looking untreated oval medium blue sapphire cabochon from Africa.  Would be nice in a variety of designs for both women and men. Good size for a sapphire mens ring.
Loose Oval Over 10 Carat Untreated Blue Sapphire Cabochon - Oval Blue Sapphire Cab
12.8 x 11.1 x 6.8
10.15ct
Add to Inquiry

Not finding what you are looking for or have a special request? Since Our inventory of wholesale loose gemstones is vast we have much more then what you see online. Please give us a call at 800-528-4490 or Click Here to Contact Us

Sign up for our newsletter!

x

Please don't show this again