Pollucite Vs Sillimanite
Origin
Afghanistan, Southern and central Africa
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
Color
Grey, White, Colorless, gray, Pale pink, Blue
Blue, Green, Brownish, Greenish, Colorless, gray
For which Rashi?
Not Available
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Planet
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Element of Planets
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Finger
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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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Solubility
Readily soluble in HF
Not Available
Durability
Not Available
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Specific Gravity
2.86-2.94
3.20-3.26
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Splintery
Cleavage
None observed
{010} perfect
Mohs Hardness
6.5-7
6-7.5
Chemical Composition
(Cs,Na)(AlSi 2O 6) · 0.5H 2OWalter Schumann , Gemstones of the world (2001) More from other references
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous, Greasy
Vitreous, Subadamantine, Silky
Pleochroism
Not Available
Colourless to pale brown to yellow
Transparency
Transparent, Translucent
Transparent, Translucent
Refractive Index
1.517-1.525
1.653-1.685
Optic Character
Not Available
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Crystal System
Isometric
Orthorhombic
Birefringence
Not Available
0.020-0.022
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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Pollucite Vs Sillimanite Fracture
Fracture is an important parameter when you compare Pollucite and Sillimanite Physical Properties. It is necessary to understand the significance of these properties, before you compare Pollucite Vs Sillimanite 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 Pollucite is Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009) and Uneven. Sillimanite fracture is Splintery.
Pollucite Vs Sillimanite Luster
A primary knowledge about Pollucite vs Sillimanite 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. Pollucite exhibits Greasy and Vitreous luster. Sillimanite, on other hand, exhibits Silky, Subadamantine and Vitreous luster.