Origin
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
Canada, Russia
Color
Blue, Green, Brownish, Greenish, Colorless, gray
Brown, Yellow, Greenish, Brown, Yellow, Greenish, Brown, Brownish, Red, Yellow
Streak
White
Brown, White, Brown, White
For which Rashi?
Not Available
Not Available
Planet
Not Available
Not Available
Element of Planets
Not Available
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Energy
Not Available
Not Available
Deities
Not Available
Not Available
Not to wear with
Not Available
Not Available
Powers
Not Available
Not Available
Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Tenacity
Tough
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.20-3.26
3.2-3.4
Fracture
Splintery
Uneven, Brittle, Metallic
Cleavage
{010} perfect
Perfect on [001] imperfect on [100]
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Luster
Vitreous, Subadamantine, Silky
Greasy, Pearly
Pleochroism
Colourless to pale brown to yellow
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
Dispersion
Not Available
Not Available
Transparency
Transparent, Translucent
Translucent
Refractive Index
1.653-1.685
1.678-1.758
Optic Character
Not Available
Not Available
Crystal System
Orthorhombic
Triclinic
Birefringence
0.020-0.022
0.050
Clarity
Transparent
Translucent
Neurological
Not Available
Not Available
Cardiovascular
Not Available
Not Available
Respiratory
Not Available
Not Available
Reproductive
Not Available
Not Available
Digestive
Not Available
Not Available
Psychology
Not Available
Not Available
Healing
Not Available
Not Available
Qualities Associated
Not Available
Not Available
Sillimanite Vs Astrophyllite Fracture
Fracture is an important parameter when you compare Sillimanite and Astrophyllite Physical Properties. It is necessary to understand the significance of these properties, before you compare Sillimanite Vs Astrophyllite fracture. Whenever a gemstone chip breaks, it leaves a characteristic line along its breakage. Such lines are known as fracture and are used to identify the gemstones in their initial stages of production when they are in the form of rough minerals. Fracture is usually described with the terms “fibrous” and “splintery” to denote a fracture that usually leaves elongated and sharp edges. Fracture observed in Sillimanite is Splintery. Astrophyllite fracture is Brittle, Metallic and Uneven.
Sillimanite Vs Astrophyllite Luster
A primary knowledge about Sillimanite vs Astrophyllite luster is useful in apparent identifications of these gemstones. Luster is the measure of light that gets reflected when incident on a finished cut gemstone. There are two major types of lusters: Silky and Adamantine. Since luster varies between two crystals of even the same gemstone, luster is limited to basic identification criteria. Sillimanite exhibits Silky, Subadamantine and Vitreous luster. Astrophyllite, on other hand, exhibits Greasy and Pearly luster.