Powellite Vs Gahnite
Color
Yellow, Greenish, Blue, Brown, Green, gray
Blue, Green, Greenish, Black
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
4.23
4.00-4.62
Fracture
UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Conchoidal, Uneven
Cleavage
{111} Distinct
Indistinct parting on [111]
Mohs Hardness
3.5-4
7.5-8
Chemical Composition
CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Greasy, Subadamantine
Vitreous
Pleochroism
In deeply colored specimens: blue greenAnthony et al
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Dispersion
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Transparency
Transparent
Gemmological Tables (2004) More from other references
Refractive Index
1.974-1.984
1.790-1.818
Optic Character
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Crystal System
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cubic
Birefringence
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Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
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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Powellite Vs Gahnite Fracture
Fracture is an important parameter when you compare Powellite and Gahnite Physical Properties. It is necessary to understand the significance of these properties, before you compare Powellite Vs Gahnite 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 Powellite is Brittle, Conchoidal, Handbook of mineralogy (2001), Handbook of mineralogy (2001), UnevenAnthony et al and UnevenAnthony et al. Gahnite fracture is Conchoidal and Uneven.
Powellite Vs Gahnite Luster
A primary knowledge about Powellite vs Gahnite 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. Powellite exhibits Greasy and Subadamantine luster. Gahnite, on other hand, exhibits Vitreous luster.