Fayalite Vs Lazurite
Origin
Southern and central Africa
Afghanistan, Southern and central Africa
Color
Yellow, Brown, Black, Black
Blue, Greenish, Violet
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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Brittle
Solubility
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Soluble
Durability
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Specific Gravity
4.392
2.75
Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Uneven, UnevenArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
{010} moderate, {100} imperfect
Imperfect on {110}
Chemical Composition
Fe 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
(Na,Ca) 8Al 6Si 6O 24(SO 4,S,Cl) 2Ulrich Henn and Claudio C.
Luster
Vitreous, Resinous
Vitreous
Pleochroism
Faint
Not Available
Dispersion
Not Available
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Transparency
TransparentAnthony et al, Handbook of mineralogy (2001)
Gemmological Tables (2004) More from other references
Refractive Index
1.827-1.879
1.500
Optic Character
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Crystal System
Orthorhombic
Isometric
Birefringence
0.042-0.051
Not Available
Clarity
TransparentAnthony et al
Gemmological Tables (2004) More from other references
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 Lazurite Fracture
Fracture is an important parameter when you compare Fayalite and Lazurite Physical Properties. It is necessary to understand the significance of these properties, before you compare Fayalite Vs Lazurite 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). Lazurite fracture is Brittle, Conchoidal, Gemstones (2009), Uneven and UnevenArthur Thomas.
Fayalite Vs Lazurite Luster
A primary knowledge about Fayalite vs Lazurite 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. Lazurite, on other hand, exhibits Vitreous luster.