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12.87 ct Multicolor Boulder Opal Gemstone, Boulder Opal Gem in Oval Cabochon Shape for Sale.
Photos are of Actual Product for Sale
12.87 ct Multicolor Boulder Opal Stone, Natural Boulder Opal in Oval Cabochon Shape for Sale Boulder Opal Gemstone in 21 x 10 mm Size for Sale, Boulder Opal Stone in Multicolor Color

12.87ct Natural Multicolor Boulder Opal, Oval Cut, 21x10 mm

9.8 out of 10
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Boulder Opal Product ID: 420744
Type: Boulder Opal
Boulder Opal Weight: 12.87 ct Boulder Opal 1 gem
Boulder Opal Size: mm calibrated Boulder Opal
Boulder Opal Size: 21 x 10 x 6.8 mm Boulder Opal
Boulder Opal Exact Size: 21.01 x 9.97 x 6.75 mm
Length x Width x Depth
Boulder Opal Shape: Oval Cabochon Boulder Opal
Boulder Opal Color: Multicolor Boulder Opal
Boulder Opal Clarity: Opaque Boulder Opal
Boulder Opal Treatment: Untreated
Boulder Opal Origin: Australia Boulder Opal
Content: 1 pc
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Product Description

This is a 12.87 carat natural multicolor Boulder Opal gem, 1 pc in oval shape with an exact size of 21.01 x 9.97 x 6.75 mm. This loose Boulder Opal gemstone was mined in Australia and its clarity is Opaque. No treatment has been applied on this natural Boulder Opal stone

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Overall Rating -> 10 star ratings

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Posted By Ricky in October, 2025
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Posted By Zæck in December, 2025
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I have found GemSelect to have the best selections of quality stones at a reasonable price. I like the packaging and the report availability.

Posted By Sam in March, 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

Plan on purchasing on an ongoing basis. So far.....so good....

Posted By Jim in January, 2026
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