Hardness:8.5-9 Refractive index:2.15 Specific Gravity:5.6-6.0 Heat Sensitivity:Low Cubic Zirconia was first offered as a diamond substitute over 20 year ago. It is Durable, hard, flawless and inexpensive.
Metal Clay firing test results;Silver 1200F-1HR-OK, Silver 1475F-1HR-OK, Silver 1650F-2HR OK, Bronze 1525F-2HR-OK, Copper 1778F-30min-OK