Crystal Hessonite Garnet

Chemical Formula

X2+3Y3+2Si3O12
X represents Ca, Fe2+, Mn, or Mg
Y represents Al, Cr, or Fe3+

Color 

Red, brown, black, green, yellow, orange, pink, white, and colorless. (Garnets come in all colors with the exception of bluish shades

Luster

Vitreous, adamantine, dull

Transparency

Transparent to Opaque

Crystal System

Isometric

Hardness

6.5 - 8.0 mohs

Specific Gravity

3.5 - 4.3

Tenacity

Brittle