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Home Gemstones Tanzanite
1.79 ctw Blue Tanzanite Gemstones, Tanzanite Gems in Round Cabochon Shape for Sale.
Photos are of Actual Products for Sale
1.79 ctw Blue Tanzanite Stones, Natural Tanzanite in Round Cabochon Shape for Sale Tanzanite Gemstones in 6 mm (calibrated) Size for Sale, Tanzanite Stones in Silverish Blue Color

1.79ct Natural Blue Tanzanite, Round Cut, 6.00 mm

9.7 out of 10
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Product ID: 585131
Type: Tanzanite
Weight: 1.79 ct (total) 2 gems
avg. 0.90 ct
Size: 6 mm calibrated
Size: 6 mm
Exact Size: 6.00 x 2.74 mm
Diameter x Depth
Shape: Round Cabochon
Color: Silverish Blue
Clarity: Transparent
Treatment: Heated
Origin: Tanzania
Content: 2 pcs
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Product Description

These are 1.79 carat natural silverish blue Tanzanite gems, 2 pcs in round shape with an exact size of 6.00 mm x 2.74 mm (avg.). These loose Tanzanite gemstones were mined in Tanzania and their clarity is Transparent. This natural Tanzanite has been heated to enhance its vivid color.

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GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 9 star ratings

I loved the selection of gemstones you have a to z

Posted By James in May, 2026
Source: Bizrate

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
Source: Bizrate

Overall Rating -> 9 star ratings

Very good and simple exchange

Posted By Waylon in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

All these questions, and I don't have to give any blood. What a Deal... I absolutely enjoy the Gem Select emails every month. This one today was special. I always say, I'll know it when I see it. This stone today was the One. Odd and Intriguing. Thank You So Much for all that you do.

Posted By G.W. in June, 2025
Source: Bizrate

Overall Rating -> 8 star ratings

First time using this website. It was both exciting finding things in my price range and things Iam gonna save up for and use in other pieces. I love that the picture of the gem is the exact gem I'll be buying. I haven't tested the gems yes but they said they sold me 100% natural gems.

Posted By Salvo in July, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Love the precise descriptions and calibrations of hte loose gemstones. Would like to have seen more variety in the size gem I was looking for.

Posted By RenoRose in January, 2026
Source: Bizrate
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