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Cubic Zirconia - Fire Opal - Square
Cubic Zirconia - Fire Opal - Square


Rated AAA, our lab created cubic zirconias are as beautiful as natural diamonds. Our high quality, calibrated CZs 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 diamonds with these beautiful, affordable stones.

Click here to download a PDF version of our firing guide.
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Item# Item Name Price Qty Add
CZF-305 CZ - Fire Opal - Square 4mm - Pkg - 4
CZF-306 CZ - Fire Opal - Square 6mm - Pkg - 2
CZF-326 CZ - Fire Opal - Square 8mm - Pkg - 1
CZF-305.5 CZ - Fire Opal - Square 10mm - Pkg - 1
CZF-306.5 CZ - Fire Opal - Square 12mm - Pkg - 1
CZF-326.5 CZ - Fire Opal - Square 14mm - Pkg - 1
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Cubic Zirconia Fire Opal

Open Fire or Carbon Fire at 1560F / 20 min. May be fired up to 2 hours at 1650F, but color will fade slightly. Hardness: Cubic zirconia has a rating of approximately 8.5 on Mohs hardness scale vs. a rating of 10 for diamond.