Origin
Italy, China
Spain, China
Color
Colorless, White, Blue, gray
Red, gray, Brown, pink
Streak
White
Scarlet, Red
For which Rashi?
-
-
Planet
-
-
Element of Planets
-
-
Energy
-
-
How to Wear?
Finger
-
-
Ring Metal
-
-
Deities
-
-
Not to wear with
-
-
Powers
-
-
Birthstone
Planetary
-
-
Talisman
-
-
Tenacity
Brittle
Slightly sectile
Solubility
-
1.04 x 10−25 g per 100 ml water (Ksp at 25°C = 2 x 10−32)
Durability
-
-
Specific Gravity
3.092
1
7.18
👆🏻
Fracture
Uneven
Uneven
Cleavage
Perfect on {100} and {010}, imperfect on {101}
Prismatic {10 1 0}, perfect
Mohs Hardness
82-2.5
2
10
👆🏻
Chemical Composition
CaAl2Si2O7(OH)2.H2O
HgSMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Vitreous, Greasy
Adamantine
Pleochroism
Weak
-
Dispersion
0.010.06
0.005
1
👆🏻
Transparency
-
Translucent
Refractive Index
1.672-1.6762.905-3.25
1
3.25
👆🏻
Optic Character
-
-
Crystal System
Orthorhombic
Trigonal
Birefringence
0.019-0.021-9999
0
0.296
👆🏻
Clarity
-
Translucent
Physical
Neurological
-
Boosts mental agility and focus
Cardiovascular
-
-
Respiratory
Good
Poor
Reproductive
-
-
Digestive
-
-
Psychology
-
Passion
Healing
Emotional healing
Emotional healing
Qualities Associated
-
Manifestation