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Home Gemstones Black Opal
3.18 ct Multicolor Black Opal Gemstone, Black Opal Gem in Round Cabochon Shape for Sale.
Photos are of Actual Product for Sale
3.18 ct Multicolor Black Opal Stone, Natural Black Opal in Round Cabochon Shape for Sale Black Opal Gemstone in 11 mm (calibrated) Size for Sale, Black Opal Stone in Multicolor Color

3.18ct Natural Multicolor Black Opal, Round Cut, 11.31 mm

9.7 out of 10
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Product ID: 746100
Type: Black Opal
Weight: 3.18 ct 1 gem
Size: 11 mm calibrated
Size: 11.3 mm
Exact Size: 11.31 x 5.80 mm
Diameter x Depth
Shape: Round Cabochon
Color: Multicolor
Clarity: Transparent
Treatment: Smoked
Origin: Ethiopia
Content: 1 pc
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Product Description

This is a 3.18 carat natural multicolor Black Opal gem, 1 pc in round shape with an exact size of 11.31 mm x 5.80 mm . This loose Black Opal gemstone was mined in Ethiopia and its clarity is Transparent.

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GemSelect Certified Store Reviews

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Overall Rating -> 9 star ratings

The website was easy to use and informative of the selection of stones it has. I quickly found the right stone for me.

Posted By Guero in March, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

On the clarity options it goes "and better" so if youre looking for si specifically and you click si and better it still shows you basically everything. It just removes the opaques. Itd be nice if it was vs only, vss only, si only, etc

Posted By Iamnotakrustykrab in December, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

this site is awesome. I was able to look at the products think about purchasing and come back and find the same products. With the amount of inventory gem select has. Its awesome to be able to filter the way that they allow you too.

Posted By Tommyp in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

This is the first time I have used this site. I was dissatisfied with the quality of gems and supplies elsewhere and decided to try GemSelect. They are awesome! I was thrilled to see the variety and the great web performance. There was the ability to search for information as well as gems. Things like the clarity rating system and caret weight of the gems. I have always loved making things and I have just started to make jewelry as a business. However I have never made a ring before and have always wanted to. On GemSelect I was able to find good quality gems to use in my creations. I am so glad the website is so easy to use. Thank you GemSelect.

Posted By PickyShopper in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

Love beauty, color, quality, and price of these gems. Personal projects and will come here soon and everytime.

Posted By Darkstar in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

I was able to find what I wanted very easily!

Posted By Lenny in January, 2026
Source: Bizrate
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