Color
Blue, Green
Yellow, Brown, Black, Colorless, White, Brownish
Solubility
-
Effervesces in hot HCl
Specific Gravity
3.80-4.15
2.92-3.12
Fracture
Uneven
Conchoidal
Cleavage
perfect along [010] and [100]
[10 1 1] perfect
Mohs Hardness
3.5-4
3.5-4.5
Chemical Composition
Cu 5(SiO 3) 4(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
MgCO 3Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Pleochroism
X = very pale blue; Y = pale blue; Z = deep blue
-
Transparency
Translucent
Translucent
Refractive Index
1.752-1.815
1.509-1.720
Crystal System
Orthorhombic
Trigonal
Birefringence
0.063
0.191
Clarity
Translucent
Translucent
Digestive
-
Supports digestive health
Psychology
Communication
Calming
Healing
Emotional healing
Emotional healing
Qualities Associated
Communication
Relaxation