Origin
Southern and central Africa
Mexico
Color
Colorless, Yellow
Colorless, White, Greenish, Brown
Specific Gravity
2.59-2.60
2.20-2.40
Fracture
-
Conchoidal, Splintery, Fibrous
Cleavage
{001} Perfect, {110} Distinct, {101} Distinct
Perfect on {010}, distinct on {100}
Chemical Composition
Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
CaSO 4 -2(H 2O)Arthur Thomas , Gemstones (2009)
Luster
Vitreous
Vitreous, Silky, Pearly, Waxy
Transparency
TransparentAnthony et al
Transparent, Translucent
Refractive Index
1.583-1.614
1.521-1.531
Crystal System
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21
monoclinic
Birefringence
-9999
0.010
Clarity
TransparentAnthony et al
Transparent
Cardiovascular
Promotes mental clarity
-
Psychology
Harmony
Harmony
Healing
Emotional healing
Emotional healing
Qualities Associated
Creativity
Harmony