Sillimanite Vs Atacamite
Origin
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
Not Available
Color
Blue, Green, Brownish, Greenish, Colorless, gray
Green, Green, Yellow, Black
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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Solubility
Not Available
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Durability
Not Available
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Specific Gravity
3.20-3.26
3.745-3.776
Fracture
Splintery
Conchoidal, Conchoidal, Brittle
Cleavage
{010} perfect
Perfect on {010}, fair on {101}
Mohs Hardness
6-7.5
3-3.5
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Cu2Cl(OH)3
Luster
Vitreous, Subadamantine, Silky
Adamantine, Vitreous
Pleochroism
Colourless to pale brown to yellow
X = pale green; Y = yellow-green; Z = grass-green
Dispersion
Not Available
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Transparency
Transparent, Translucent
Not Available
Refractive Index
1.653-1.685
1.831
Optic Character
Not Available
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Crystal System
Orthorhombic
Orthorhombic
Birefringence
0.020-0.022
0.049
Clarity
Transparent
Not Available
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 Atacamite Fracture
Fracture is an important parameter when you compare Sillimanite and Atacamite Physical Properties. It is necessary to understand the significance of these properties, before you compare Sillimanite Vs Atacamite 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. Atacamite fracture is Conchoidal, Conchoidal and Brittle.
Sillimanite Vs Atacamite Luster
A primary knowledge about Sillimanite vs Atacamite 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. Atacamite, on other hand, exhibits Adamantine and Vitreous luster.