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Home Gemstones Tanzanite
3.87 ct Blue Tanzanite Gemstone, Tanzanite Gem in Oval Cabochon Shape for Sale.
Photos are of Actual Product for Sale
3.87 ct Blue Tanzanite Stone, Natural Tanzanite in Oval Cabochon Shape for Sale Tanzanite Gemstone in 10 x 8 mm (calibrated) Size for Sale, Tanzanite Stone in Deep Blue Color

3.87ct Natural Blue Tanzanite, Oval Cut, 10x7.7 mm

9.7 out of 10
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Product ID: 701624
Type: Tanzanite
Weight: 3.87 ct 1 gem
Size: 10 x 8 mm calibrated
Size: 10 x 7.7 x 5.6 mm
Exact Size: 10.01 x 7.71 x 5.64 mm
Length x Width x Depth
Shape: Oval Cabochon
Color: Deep Blue
Clarity: Translucent
Treatment: Heated
Origin: Tanzania
Content: 1 pc
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Product Description

This is a 3.87 carat natural deep blue Tanzanite gem, 1 pc in oval shape with an exact size of 10.01 x 7.71 x 5.64 mm. This loose Tanzanite gemstone was mined in Tanzania and its clarity is Translucent. This natural Tanzanite has been heated to enhance its vivid color.

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Overall Rating -> 9 star ratings

Nothing bad to report. Everything is as expected. The gems and the price are all very good.

Posted By Dafanatic in August, 2025
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Overall Rating -> 10 star ratings

Wonderful purchase, can't wait to see the stone.

Posted By Tim in January, 2026
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Overall Rating -> 9 star ratings

Very easy to navigate with a great selection.

Posted By Bar181 in August, 2025
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Overall Rating -> 10 star ratings

I've purchased from here many times over the last decade+. I find the information easy to understand, helpful, and interesting. I have always been satisfied that I got exactly what I ordered. Pictures and descriptions are clear and unique to each stone.

Posted By Maggie in August, 2025
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Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
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Overall Rating -> 7 star ratings

Easy, quick.

Posted By Mich in June, 2026
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