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12.46 ct Green Opal Gemstone, Opal Gem in Oval Cabochon Shape for Sale.
Photos are of Actual Product for Sale
12.46 ct Green Opal Stone, Natural Opal in Oval Cabochon Shape for Sale Opal Gemstone in 18 x 13.7 mm Size for Sale, Opal Stone in Warm Green Color

12.46ct Natural Warm Green Opal, Oval Cut, 18x13.7 mm

9.6 out of 10
See Bizrate Ratings for GemSelect
Product ID: 674960
Type: Opal
Weight: 12.46 ct 1 gem
Size: mm calibrated
Size: 18 x 13.7 x 8.8 mm
Exact Size: 18.00 x 13.68 x 8.75 mm
Length x Width x Depth
Shape: Oval Cabochon
Color: Warm Green
Clarity: Opaque
Treatment: Untreated
Origin: Brazil
Content: 1 pc
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Product Description

This is a 12.46 carat natural warm green Opal gem, 1 pc in oval shape with an exact size of 18.00 x 13.68 x 8.75 mm. This loose Opal gemstone was mined in Brazil and its clarity is Opaque. No treatment has been applied on this natural Opal stone

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GemSelect Certified Store Reviews

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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

Overall Rating -> 10 star ratings

Great experience. I can't wait to explore on the website further.

Posted By Kymmie in September, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The stones are very nice.

Posted By Mvk in August, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Enjoy viewing the selections. Excellent product

Posted By ToRa.62 in April, 2026
Source: Bizrate

Overall Rating -> 10 star ratings

I love the ability to choose from many options of shapes, gemstone type, color, and so forth. It is fun!

Posted By Geof in November, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

Great for buying gemstones, came with authenticity certs. Will buy again someday!

Posted By Uggadugga in May, 2025
Source: Bizrate
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Enlarged Gemstone Image