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17.24 ct Multicolor Boulder Opal Gemstone, Boulder Opal Gem in Trillion Cabochon Shape for Sale.
Photos are of Actual Product for Sale
17.24 ct Multicolor Boulder Opal Stone, Natural Boulder Opal in Trillion Cabochon Shape for Sale Boulder Opal Gemstone in 21.2 x 17.4 mm Size for Sale, Boulder Opal Stone in Multicolor Color

17.24ct Multicolor Boulder Opal, Trillion, 21.2x17.4 mm

9.7 out of 10
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Product ID: 678874
Type: Boulder Opal
Weight: 17.24 ct 1 gem
Size: mm calibrated
Size: 21.2 x 17.4 x 6.3 mm
Exact Size: 21.19 x 17.40 x 6.28 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 17.24 carat natural multicolor Boulder Opal gem, 1 pc in trillion shape with an exact size of 21.19 x 17.40 x 6.28 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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GemSelect Certified Store Reviews

GemSelect: Over 22 Years in the Gemstone Business! Thank you for trusting us with your purchase!

Overall Rating -> 10 star ratings

Gem Select has a user friendly website and the product is very good as is the price. The gems are described accurately and I always get what I think I'm getting.

Posted By Happy Customer in June, 2025
Source: Bizrate

Overall Rating -> 10 star ratings

The citrine gems are beautiful. I appreciated that each stone was individually shown on the website so I could see exactly what I was getting. No mystery person selecting random stones for me. The documentation included with each gem was high quality as well. Great price and arrived as expected.

Posted By Jen in December, 2025
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

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

I feel Gemselect is a trustworthy company to buy from

Posted By Becky in October, 2025
Source: Bizrate

Overall Rating -> 9 star ratings

I did not realize these stones were of jewelry quality. They are really beautiful, just not what I was expecting which was more of a natural stone.

Posted By Jewelry Quality Stones in July, 2025
Source: Bizrate
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