Origin
China, Russia
Linares, Jaén, Andalusia, Spain
Specific Gravity
3.77
5.35
Fracture
Uneven, Conchoidal
Conchoidal
Cleavage
None
Perfect on {100}, imperfect on {001}
Mohs Hardness
6.5-7.5
2.5
Chemical Composition
Ca 3Cr 2(SiO 4) 3Ulrich Henn and Claudio C.
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous
Sub-Adamantine, Vitreous
Pleochroism
-
X = pale blue; Y = blue; Z = Prussian blue
Transparency
Translucent
Transparent
Refractive Index
1.87
1.809-1.859
Crystal System
cubic
monoclinic
Birefringence
-9999
0.050
Clarity
Translucent
Transparent
Cardiovascular
Supports heart health
-
Respiratory
Excellent
Good
Reproductive
Supports reproductive health
-
Digestive
-
Supports digestive health
Psychology
-
Self-Expression
Healing
Emotional healing
Emotional healing
Qualities Associated
Vitality
Communication