Color
Colorless, White, gray, Brownish, Greenish
Red, Brown, Yellow, pink
Specific Gravity
2.78-2.88
3.06-3.19
Cleavage
Perfect on the {001}
{010} Perfect
Chemical Composition
KAl 2AlSi 3O 10(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
Mn 8Si 6O 15(OH,Cl) 10Ulrich Henn and Claudio C.
Luster
Vitreous, Silky, Pearly
-
Transparency
Transparent
Translucent
Refractive Index
1.552-1.618
1.627-1.663
Crystal System
monoclinic
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m
Birefringence
-9999
0.032-0.035
Clarity
Transparent
Translucent
Psychology
Reflection
Harmony
Healing
Emotional healing
-
Qualities Associated
Awareness
Creativity