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Home Gemstones Nuummite
10.64 ct Black Nuummite Gemstone, Nuummite Gem in Octagon Step Cut Shape for Sale.
Photos are of Actual Product for Sale
10.64 ct Black Nuummite Stone, Natural Nuummite in Octagon Step Cut Shape for Sale Nuummite Gemstone in 15.2 x 12.9 mm Size for Sale, Nuummite Stone in Black with Blue Sparkle Color

10.64ct Natural Black Nuummite, Emerald Cut, 15.2x12.9 mm

9.6 out of 10
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Product ID: 627828
Type: Nuummite
Weight: 10.64 ct 1 gem
Size: mm calibrated
Size: 15.2 x 12.9 x 6.9 mm
Exact Size: 15.22 x 12.85 x 6.91 mm
Length x Width x Depth
Shape: Octagon Step Cut
Color: Black with Blue Sparkle
Clarity: Opaque
Treatment: Untreated
Origin: India
Content: 1 pc

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Product Description

This is a 10.64 carat natural black with blue sparkle Nuummite gem, 1 pc in octagon / emerald cut shape with an exact size of 15.22 x 12.85 x 6.91 mm. This loose Nuummite gemstone was mined in India and its clarity is Opaque. No treatment has been applied on this natural Nuummite stone

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Overall Rating -> 10 star ratings

I needed a very specific color of tourmaline and Gem Select had it. I had to get the client to agree and then ordered the stone. It arrived better than pictured and we all were very happy.

Posted By Tim W in February, 2026
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Always get a nice gemstone. Just like the picture. Never disappointed

Posted By Ron T in June, 2026
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They have literally everything on this website! The prices are also pretty good, I was able to find plenty of nice stones that I could afford!

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Posted By LeAnn in January, 2026
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Very good. I have made several purchases as a collector over the years, and have never been dissapointed in the selection, process, or delivery.

Posted By Schmoove in August, 2026
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Posted By Beman in September, 2025
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