Sillimanite Vs Friedelite
Origin
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
USA
Color
Blue, Green, Brownish, Greenish, Colorless, gray
Red, Brown, Yellow, pink
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
3.06-3.19
Fracture
Splintery
UnevenArthur Thomas, Gemstones (2009) Tough, Brittle, Uneven
Cleavage
{010} perfect
{010} Perfect
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Mn 8Si 6O 15(OH,Cl) 10Ulrich Henn and Claudio C.
Luster
Vitreous, Subadamantine, Silky
Not Available
Pleochroism
Colourless to pale brown to yellow
NilArthur Thomas
Dispersion
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Transparency
Transparent, Translucent
Translucent
Refractive Index
1.653-1.685
1.627-1.663
Optic Character
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Crystal System
Orthorhombic
Monoclinic Prismatic H-M Symbol (2/m) Space Group: C 2/m
Birefringence
0.020-0.022
0.032-0.035
Clarity
Transparent
Translucent
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 Friedelite Fracture
Fracture is an important parameter when you compare Sillimanite and Friedelite Physical Properties. It is necessary to understand the significance of these properties, before you compare Sillimanite Vs Friedelite 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. Friedelite fracture is UnevenArthur Thomas, Gemstones (2009) Tough, Brittle and Uneven.
Sillimanite Vs Friedelite Luster
A primary knowledge about Sillimanite vs Friedelite 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.