Great for tube setting, sand casting, silver clay, and stone in place setting bur metalsmithing techniques. Color: Dark Orange Diamond Faceted Cut AAA Size: Choose 2.5mm or 3mm 

Heat resistant up to 900F Cubic Zirconia (or CZ) is zirconium oxide (ZrO2 ), is widely synthesized for use as a diamond simulant and it is a lab made created stone with a specific gravity of between 5.6-6.00 and at about 7.5 hardness on Mohs scale, which is harder than most natural gems. Its refractive index is high at 2.15 - 2.18 (B-G interval) and its luster is very good. Its dispersion is very high at 0.058 - 0.066, exceeding that of diamond (0.044). nd (0.044).