Description Opal White Quartz 8mm Round Concave Cuts *Sold in Packs of 2 Please note these are deeper cut with thicker cut girdles. Moh’s Scale Hardness: 7 Specific Gravity: 2.65 Refractive Index: 1.54-1.55 Treatment: Permanent Coating Care: Avoid Ultrasonic Cleaners, and excessive wear/polishing on stone
