Iolite Blue Quartz 8mm Rounds (Sold as Pack 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
