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Our Latest Offerings

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
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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
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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
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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
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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
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Lovely matched pair of round purple amethyst. This nice 10 mm round pair of amethyst have a rich velvety purple color with great clarity and cut.
Loose Round Pair of Amethyst - Round Amethyst Pair
10 x 10 x 6.3
7.29ct
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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
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Loose pear shape emerald. This very nice pear shaped emerald is well cut and  lively.
Loose Pear Shape Emerald
6.5 x 4.6 x 3.3
0.60ct
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Loose pear shape emerald. This very nice pear shaped emerald is well cut and  lively.
Loose Pear Shape Emerald
6.9 x 4.5 x 2.6
0.45ct
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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
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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
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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
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about
NAFCO Gems is a fine color wholesale gemstones supplier located in the United States specializing in fine quality loose colored gemstones with an emphasis in diamond cut round and princess cut square ruby and sapphire melee. Not only have we been known for the best quality sapphires in all colors, we have in stock a very large and diverse natural gemstone inventory in all sizes, unique & standard cuts, and shapes in a variety of other gemstones. Such as tourmalines, spinels, zircons, ruby, emeralds, tsavorites and many other garnet varieties, amethyst, aquamarines, peridot and the list goes on.



We also provide the service of gemstone color matching and gemstone suite layout. When it comes to loose colored gemstones we can provide you with a super fine single gemstone, a funky fancy cut gem, a fun unique gemstone, a parcel of melee or matched gemstone suites.

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