Nepheline Vs Dravite
Origin
Canada
Southern and central Africa
Color
White, Reddish, gray, Brown, Brownish
White, Colorless, Blue, Red, Green, Yellow, Violet, Black, Green, Red, Blue, White
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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Solubility
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Durability
Not Available
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Specific Gravity
2.55-2.65
3.03-3.18
Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Cleavage
[1010] Poor
{???} Indistinct
Chemical Composition
Na 3(Na,K)Al 4Si 4O 16Ulrich Henn and Claudio C.
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Luster
Vitreous, Greasy
Vitreous
Pleochroism
Not Available
Very strong: pale yellow colorless
Transparency
Transparent, Translucent
Transparent
Refractive Index
1.529-1.547
1.614-1.666
Optic Character
Not Available
Not Available
Crystal System
Hexagonal
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Birefringence
0.003-0.004
0.014-0.032
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 Dravite Fracture
Fracture is an important parameter when you compare Nepheline and Dravite Physical Properties. It is necessary to understand the significance of these properties, before you compare Nepheline Vs Dravite 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. Dravite fracture is Brittle, Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Irregular, Uneven and Uneven.
Nepheline Vs Dravite Luster
A primary knowledge about Nepheline vs Dravite 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. Dravite, on other hand, exhibits Vitreous luster.