Origin
Linares, Jaén, Andalusia, Spain
Madagascar
Color
Blue
Red, Colorless, Yellow, White
Specific Gravity
5.35
3.34-3.44
Fracture
Conchoidal
Conchoidal
Cleavage
Perfect on {100}, imperfect on {001}
{111} Indistinct, {111} Indistinct, {111} Indistinct
Chemical Composition
PbCu(SO 4)(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
(K,Cs)Al 4Be 4(B,Be) 12O 28Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Sub-Adamantine, Vitreous
Adamantine
Pleochroism
X = pale blue; Y = blue; Z = Prussian blue
-
Transparency
Transparent
-
Refractive Index
1.809-1.859
1.684-1.694
Crystal System
monoclinic
-
Birefringence
0.050
-9999
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
Digestive
Supports digestive health
-
Psychology
Self-Expression
Creativity
Healing
Emotional healing
-
Qualities Associated
Communication
Energy Amplification