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Home Gemstones Boulder Opal
19.83 ct Multicolor Boulder Opal Gemstone, Boulder Opal Gem in Trillion Cabochon Shape for Sale.
Photos are of Actual Product for Sale
19.83 ct Multicolor Boulder Opal Stone, Natural Boulder Opal in Trillion Cabochon Shape for Sale Boulder Opal Gemstone in 22.8 x 21.2 mm Size for Sale, Boulder Opal Stone in Multicolor Color

19.83ct Multicolor Boulder Opal, Trillion, 22.8x21.2 mm

9.7 out of 10
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Product ID: 575198
Type: Boulder Opal
Weight: 19.83 ct 1 gem
Size: mm calibrated
Size: 22.8 x 21.2 x 5.2 mm
Exact Size: 22.80 x 21.18 x 5.21 mm
Length x Width x Depth
Shape: Trillion Cabochon
Color: Multicolor
Clarity: Opaque
Treatment: Untreated
Origin: Australia
Content: 1 pc
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Product Description

This is a 19.83 carat natural multicolor Boulder Opal gem, 1 pc in trillion shape with an exact size of 22.80 x 21.18 x 5.21 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

I could see the actual gem I was buying

Posted By Bugs in December, 2025
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Overall Rating -> 8 star ratings

I've purchased things from GemSelect before. What you see is what you get, which is not always the case with gem sites online. You can find some good value with gem select, and I will buy from them again.

Posted By Meyeusername in March, 2026
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Overall Rating -> 9 star ratings

Will know more once order received

Posted By Jim in September, 2025
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Posted By Mich in June, 2026
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Overall Rating -> 8 star ratings

It was fine

Posted By Na in April, 2026
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