Nepheline Vs Powellite
Color
White, Reddish, gray, Brown, Brownish
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
Not Available
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Specific Gravity
2.55-2.65
4.23
Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
[1010] Poor
{111} Distinct
Chemical Composition
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous, Greasy
Greasy, Subadamantine
Pleochroism
Not Available
In deeply colored specimens: blue greenAnthony et al
Dispersion
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Transparency
Transparent, Translucent
Transparent
Refractive Index
1.529-1.547
1.974-1.984
Optic Character
Not Available
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Crystal System
Hexagonal
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Birefringence
0.003-0.004
Not Available
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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Nepheline Vs Powellite Fracture
Fracture is an important parameter when you compare Nepheline and Powellite Physical Properties. It is necessary to understand the significance of these properties, before you compare Nepheline 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 Nepheline is Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009) and Subconchoidal. Powellite fracture is Brittle, Conchoidal, Handbook of mineralogy (2001), Handbook of mineralogy (2001), UnevenAnthony et al and UnevenAnthony et al.
Nepheline Vs Powellite Luster
A primary knowledge about Nepheline 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. Nepheline exhibits Greasy and Vitreous luster. Powellite, on other hand, exhibits Greasy and Subadamantine luster.