Nepheline Vs Poudretteite
Origin
Canada
Canada, Southern and central Africa
Color
White, Reddish, gray, Brown, Brownish
Violet, Colorless, pink
For which Rashi?
Not Available
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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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Brittle
Solubility
Not Available
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Durability
Not Available
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Specific Gravity
2.55-2.65
2.51-2.53
Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Conchoidal, Splintery
Cleavage
[1010] Poor
None
Chemical Composition
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
KNa 2B 3Si 12O 30Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous, Greasy
Vitreous
Pleochroism
Not Available
Colorless
Dispersion
Not Available
Not Available
Transparency
Transparent, Translucent
Gemmological Tables (2004) More from other references
Refractive Index
1.529-1.547
1.511-1.532
Optic Character
Not Available
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Crystal System
Hexagonal
Hexagonal
Birefringence
0.003-0.004
0.021
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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Nepheline Vs Poudretteite Fracture
Fracture is an important parameter when you compare Nepheline and Poudretteite Physical Properties. It is necessary to understand the significance of these properties, before you compare Nepheline Vs Poudretteite 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. Poudretteite fracture is Conchoidal and Splintery.
Nepheline Vs Poudretteite Luster
A primary knowledge about Nepheline vs Poudretteite 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. Poudretteite, on other hand, exhibits Vitreous luster.