Origin
Australia, Italy
Brazil, Tanzania, Zimbabwe, Madagascar, Burma, Sri Lanka, India
Color
Yellow, Red, Reddish, Brown, Colorless, White, gray
Red, Violet
Specific Gravity
2.6-2.9
3.62-4.20
Fracture
Conchoidal, Uneven
-
Cleavage
On {0001}, perfect
None
Mohs Hardness
3.5-4
7-7.5
Chemical Composition
KAl3(SO4)2(OH)6
(Fe,Mg) 3Al 2(SiO 4) 3gemdat.org , Management Team (2012)
Luster
Vitreous, Pearly
-
Transparency
-
TransparentGemdat.org
Refractive Index
1.572
1.73-1.77
Crystal System
Trigonal
-
Birefringence
0.020
-9999
Clarity
-
TransparentGemdat.org
Psychology
Stability
Courage
Healing
Emotional healing
Emotional healing
Qualities Associated
Stability
Passion