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10.37 ct Green Opal Gemstone, Opal Gem in Oval Cabochon Shape for Sale.
Photos are of Actual Product for Sale
10.37 ct Green Opal Stone, Natural Opal in Oval Cabochon Shape for Sale Opal Gemstone in 18 x 13 mm (calibrated) Size for Sale, Opal Stone in Earth Green Color

10.37ct Natural Green Opal, Oval Cut, 18.2x13.5 mm

9.7 out of 10
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Product ID: 675194
Type: Opal
Weight: 10.37 ct 1 gem
Size: 18 x 13 mm calibrated
Size: 18.2 x 13.5 x 6.9 mm
Exact Size: 18.15 x 13.50 x 6.87 mm
Length x Width x Depth
Shape: Oval Cabochon
Color: Earth Green
Clarity: Opaque
Treatment: Untreated
Origin: Brazil
Content: 1 pc
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Product Description

This is a 10.37 carat natural earth green Opal gem, 1 pc in oval shape with an exact size of 18.15 x 13.50 x 6.87 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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Overall Rating -> 10 star ratings

I purchased from you before and I have never been disappointed. I always received what I expected and your products are very nice.

Posted By MVK in July, 2025
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I have shopped at Gemselect for nearly 20 years. I especially like that you see pictures of the exact gem you are purchasing. You are a trusted source.

Posted By DNaber in October, 2025
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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
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Overall Rating -> 9 star ratings

It was great!

Posted By Annie in September, 2025
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I found the filter options excellent. Yours was the third site I visited (asked chat got for reputable online sellers of loose gems) and the first I purchased from as I was able to easily find what I was looking for.

Posted By Kelly in May, 2026
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Overall Rating -> 10 star ratings

Filters need to be improved but rest of website is great

Posted By Rock hound in December, 2025
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