BIRTHSTONES & ANNIVERSARIES

Moonstone is a birthstone for June, along with pearl and alexandrite. Moonstone is also the gemstone for the 3 year wedding anniversary.

MINERAL: Feldspar group

CHEMISTRY: KAlSi3O8

COLOR: Colorless to White, Gray, Green, Peach, Brown

REFRACTIVE INDEX: 1.518 to 1.526

BIREFRINGENCE: 0.05 to 0.008

SPECIFIC GRAVITY: 2.58

MOHS HARDNESS: 6.0 to 6.5