Nepheline Vs Fayalite
Origin
Canada
Southern and central Africa
Color
White, Reddish, gray, Brown, Brownish
Yellow, Brown, Black
For which Rashi?
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Planet
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Element of Planets
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Energy
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Finger
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Ring Metal
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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
2.55-2.65
4.392
Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Cleavage
[1010] Poor
{010} moderate, {100} imperfect
Chemical Composition
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous, Greasy
Vitreous, Resinous
Pleochroism
Not Available
Faint
Dispersion
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Transparency
Transparent, Translucent
TransparentAnthony et al, Handbook of mineralogy (2001)
Refractive Index
1.529-1.547
1.827-1.879
Optic Character
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Crystal System
Hexagonal
Orthorhombic
Birefringence
0.003-0.004
0.042-0.051
Clarity
Transparent
TransparentAnthony et al
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 Fayalite Fracture
Fracture is an important parameter when you compare Nepheline and Fayalite Physical Properties. It is necessary to understand the significance of these properties, before you compare Nepheline Vs Fayalite 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 Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal and Brittle. Fayalite fracture is Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001) and Brittle.
Nepheline Vs Fayalite Luster
A primary knowledge about Nepheline vs Fayalite 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 Vitreous and Greasy luster. Fayalite, on other hand, exhibits Vitreous and Resinous luster.