Petalite Vs Nepheline
Origin
Canada, USA, Brazil, Italy, Mozambique, Zimbabwe, Russia, Burma, Australia
Canada
Color
Colorless, gray, Yellow, White
White, Reddish, gray, Brown, Brownish
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
Brittle
Not Available
Solubility
insoluble
Not Available
Durability
Not Available
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Specific Gravity
2.40
2.55-2.65
Fracture
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
Perfect on {001}, poor on {201} with 38.5° angle between the two
[1010] Poor
Chemical Composition
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Luster
Vitreous, Pearly
Vitreous, Greasy
Pleochroism
AbsentWalter Schumann
Not Available
Transparency
Gemmological Tables (2004) More from other references
Transparent, Translucent
Refractive Index
1.502-1.523
1.529-1.547
Optic Character
Not Available
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Crystal System
monoclinic
Hexagonal
Birefringence
0.012-0.016
0.003-0.004
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
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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Petalite Vs Nepheline Fracture
Fracture is an important parameter when you compare Petalite and Nepheline Physical Properties. It is necessary to understand the significance of these properties, before you compare Petalite Vs Nepheline 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 Petalite is Brittle, Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references and Subconchoidal. Nepheline fracture is Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009) and Subconchoidal.
Petalite Vs Nepheline Luster
A primary knowledge about Petalite vs Nepheline 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. Petalite exhibits Pearly and Vitreous luster. Nepheline, on other hand, exhibits Greasy and Vitreous luster.