I’m excited to create with this beautiful cab!
"I have purchased a lot of cabs from Cool Tools and this is one of my favorites!"
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SKU:LAB-250
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Made in China
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Our lab created gemstones are as beautiful as natural stones. These high quality stones are precision cut and perfect for any setting, or to embed directly into metal clay.
Available in a variety of shapes, sizes and colors, get the sparkle and shine of natural stones with these beautiful, affordable gemstones.
Lab created gemstones are more affordable than natural stones, and unlike natural stones, they have no flaws.
No Fire: Set after firing. Hardness: Imitation Opal has a rating of approximately 5.5 on Mohs hardness scale.
Thickness: LAB-249: 2.8mm. LAB-250: 2.2mm.

Overall rating: 5.0 / 5 from 4 reviews.
Review topics: ["cups"].
"I have purchased a lot of cabs from Cool Tools and this is one of my favorites!"
— jEANIE B. (5/5)
"I love these stones - they're striking and they're durable. The colors are stunning, they make a special piece of jewelry. I've used several and they are cut to fit the correct sized bezel cup (a huge plus)."
— Judie F. (5/5)
"perfect for adding a beautiful shimmer of captivating color"
— Willow (5/5)
"I love this gemstone. It is very pretty & I have sold quite a few pieces with this gemstone in it!"
— Kathi M. (5/5)
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