Origin
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
Canada, Brazil, Kenya, Tanzania, Madagascar, Burma, Afghanistan
Color
Blue, Green, Brownish, Greenish, Colorless, gray
Violet, White, gray, Brown, pink, Yellow
For which Rashi?
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Planet
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Element of Planets
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Energy
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Finger
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Ring Metal
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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
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Specific Gravity
3.20-3.26
2.58-2.74
Fracture
Splintery
ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Splintery
Cleavage
{010} perfect
{100} Distinct, {110} Distinct
Mohs Hardness
6-7.5
5.5-6
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Na 4Al 3Si 9O 24Cl to Ca 4Al 6Si 6O 24(CO 3,SO 4)Walter Schumann , Gemstones of the world (2001) More from other references
Luster
Vitreous, Subadamantine, Silky
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Pleochroism
Colourless to pale brown to yellow
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Transparency
Transparent, Translucent
Gemmological Tables (2004) More from other references
Refractive Index
1.653-1.685
1.540-1.579
Optic Character
Not Available
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Crystal System
Orthorhombic
tetragonal
Birefringence
0.020-0.022
0.006-0.037
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
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 Scapolite Fracture
Fracture is an important parameter when you compare Sillimanite and Scapolite Physical Properties. It is necessary to understand the significance of these properties, before you compare Sillimanite Vs Scapolite 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. Scapolite fracture is ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references and Splintery.
Sillimanite Vs Scapolite Luster
A primary knowledge about Sillimanite vs Scapolite 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 Vitreous, Subadamantine and Silky luster.