Grandidierite Vs Powellite
Color
Green
Yellow, Greenish, Blue, Brown, Green, 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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Tenacity
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Solubility
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Durability
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Specific Gravity
2.85-3.00
4.23
Fracture
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
Perfect
{111} Distinct
Chemical Composition
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous, Pearly
Greasy, Subadamantine
Pleochroism
visible
In deeply colored specimens: blue greenAnthony et al
Dispersion
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Transparency
Gemmological Tables (2004) More from other references
Transparent
Refractive Index
1.578-1.639
1.974-1.984
Optic Character
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Crystal System
Orthorhombic
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Birefringence
0.037-0.039
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Clarity
Gemmological Tables (2004) More from other references
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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Grandidierite Vs Powellite Fracture
Fracture is an important parameter when you compare Grandidierite and Powellite Physical Properties. It is necessary to understand the significance of these properties, before you compare Grandidierite Vs Powellite 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 Grandidierite is Brittle, Brittle, Gemstones (2009), Uneven and UnevenArthur Thomas. Powellite fracture is Brittle, Conchoidal, Handbook of mineralogy (2001), Handbook of mineralogy (2001), UnevenAnthony et al and UnevenAnthony et al.
Grandidierite Vs Powellite Luster
A primary knowledge about Grandidierite vs Powellite 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. Grandidierite exhibits Pearly and Vitreous luster. Powellite, on other hand, exhibits Greasy and Subadamantine luster.