Legrandite Vs Sillimanite
Origin
Mexico
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
Color
Yellow, yellowish orange
Blue, Green, Brownish, Greenish, Colorless, gray
For which Rashi?
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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
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Durability
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Specific Gravity
3.98-4.04
3.20-3.26
Fracture
Conchoidal, UnevenArthur Thomas, Gemstones (2009), Brittle
Splintery
Cleavage
Imperfect, poor one {100}
{010} perfect
Mohs Hardness
4.5-5
6-7.5
Chemical Composition
Zn 2(AsO 4)(OH) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous
Vitreous, Subadamantine, Silky
Pleochroism
Colorless
Colourless to pale brown to yellow
Dispersion
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Transparency
Gems
Transparent, Translucent
Refractive Index
1.702-1.740
1.653-1.685
Optic Character
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Crystal System
monoclinic
Orthorhombic
Birefringence
0.060
0.020-0.022
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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Legrandite Vs Sillimanite Fracture
Fracture is an important parameter when you compare Legrandite and Sillimanite Physical Properties. It is necessary to understand the significance of these properties, before you compare Legrandite 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 Legrandite is Brittle, Conchoidal, Gemstones (2009) and UnevenArthur Thomas. Sillimanite fracture is Splintery.
Legrandite Vs Sillimanite Luster
A primary knowledge about Legrandite 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. Legrandite exhibits Vitreous luster. Sillimanite, on other hand, exhibits Silky, Subadamantine and Vitreous luster.