Fayalite Vs Blue John
Origin
Southern and central Africa
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Color
Yellow, Brown, Black, Black
White, Colorless, Blue, Red, Green, Yellow, Violet
Streak
White
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For which Rashi?
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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
Not Available
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Durability
Not Available
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Specific Gravity
4.392
3.00-3.25
Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
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Cleavage
{010} moderate, {100} imperfect
Not Available
Mohs Hardness
6.5-7
Not Available
Chemical Composition
Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous, Resinous
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Pleochroism
Faint
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Dispersion
Not Available
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Transparency
TransparentAnthony et al, Handbook of mineralogy (2001)
Transparent
Refractive Index
1.827-1.879
1.432-1.436
Optic Character
Not Available
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Crystal System
Orthorhombic
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Birefringence
0.042-0.051
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Clarity
TransparentAnthony 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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Fayalite Vs Blue John Fracture
Fracture is an important parameter when you compare Fayalite and Blue John Physical Properties. It is necessary to understand the significance of these properties, before you compare Fayalite 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 Fayalite is Brittle, Conchoidal, Conchoidal, ConchoidalAnthony et al and Handbook of mineralogy (2001).
Fayalite Vs Blue John Luster
A primary knowledge about Fayalite 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. Fayalite exhibits Resinous and Vitreous luster.