Origin
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
USA, Mexico
Color
Blue, Green, Brownish, Greenish, Colorless, gray
Green, Brown, Greenish, Brown, Green, Green, Black
Streak
White
Greenish, gray, Greenish, gray
For which Rashi?
Not Available
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Planet
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Element of Planets
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Finger
Not Available
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Ring Metal
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Energy
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Deities
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Not to wear with
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Powers
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Planetary
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Talisman
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Tenacity
Tough
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Solubility
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Durability
Not Available
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Specific Gravity
3.20-3.26
3.19-3.56
Fracture
Splintery
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
{010} perfect
{110} Perfect, {010} Indistinct
Mohs Hardness
6-7.5
5.5-6
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
(Ca,Na)(Mg,Fe,Al,Ti)(Si,Al) 2O 6Anthony et al , Handbook of mineralogy (2001)
Luster
Vitreous, Subadamantine, Silky
Vitreous, Resinous
Pleochroism
Colourless to pale brown to yellow
Pale green
Dispersion
Not Available
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Transparency
Transparent, Translucent
Transparent, Translucent
Refractive Index
1.653-1.685
1.671-1.774
Optic Character
Not Available
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Crystal System
Orthorhombic
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/c
Birefringence
0.020-0.022
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Clarity
Transparent
Transparent
Neurological
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Cardiovascular
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Respiratory
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Reproductive
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Digestive
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Psychology
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Healing
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Qualities Associated
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Sillimanite Vs Augite Fracture
Fracture is an important parameter when you compare Sillimanite and Augite Physical Properties. It is necessary to understand the significance of these properties, before you compare Sillimanite Vs Augite 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. Augite fracture is Brittle, Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Uneven and Uneven.
Sillimanite Vs Augite Luster
A primary knowledge about Sillimanite vs Augite 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. Augite, on other hand, exhibits Resinous and Vitreous luster.