Foitite Vs Blue John
Origin
Not Available, Southern and central Africa
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Color
Violet, Black
White, Colorless, Blue, Red, Green, Yellow, Violet
Streak
gray, White
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For which Rashi?
Not Available
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Planet
Not Available
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Element of Planets
Not Available
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Energy
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Finger
Not Available
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Ring Metal
Not Available
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Deities
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Not to wear with
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Powers
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Planetary
Not Available
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Talisman
Not Available
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Tenacity
Not Available
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Solubility
Not Available
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Durability
Not Available
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Specific Gravity
3.17
3.00-3.25
Fracture
Handbook of mineralogy (2001)
Not Available
Cleavage
None
Not Available
Mohs Hardness
7
Not Available
Chemical Composition
Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous
Not Available
Pleochroism
Strong: pale lavender dark blueAnthony et al
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Dispersion
Not Available
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Transparency
TranslucentAnthony et al, Translucent
Transparent
Refractive Index
Not Available
1.432-1.436
Optic Character
Not Available
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Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
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Birefringence
Not Available
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Clarity
TranslucentAnthony et al
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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Foitite Vs Blue John Fracture
Fracture is an important parameter when you compare Foitite and Blue John Physical Properties. It is necessary to understand the significance of these properties, before you compare Foitite Vs Blue John 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 Foitite is Handbook of mineralogy (2001).
Foitite Vs Blue John Luster
A primary knowledge about Foitite vs Blue John 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. Foitite exhibits Vitreous luster.