Corundum Vs Grossular
Origin
Southern and central Africa
Sri Lanka, India, Brazil
Color
Violet, Blue, Red, Yellow, Brown, gray
Green, Brown, Brown, Colorless, Green, gray, Yellow
Streak
White, None
Brownish, White, Brownish, White
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
Brittle
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Solubility
insoluble
Not Available
Durability
Not Available
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Specific Gravity
3.90-4.05
3.55-3.73
Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Cleavage
None – parting in 3 directions
none
Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Luster
Adamantine, Vitreous
Greasy, Vitreous
Transparency
Transparent, Translucent
Gemmological Tables (2004) More from other references
Refractive Index
1.758-1.780
1.730-1.760
Optic Character
Not Available
Not Available
Crystal System
Trigonal
cubic
Birefringence
0.007-0.010
0.020
Clarity
Gemmological Tables (2004) More from other references
TransparentUlrich Henn and Claudio C. Milisenda
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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Corundum Vs Grossular Fracture
Fracture is an important parameter when you compare Corundum and Grossular Physical Properties. It is necessary to understand the significance of these properties, before you compare Corundum Vs Grossular 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 Corundum is Difficult, Fibrous, Gems, Uneven and Uneven. Grossular fracture is Brittle, Conchoidal, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009) and Uneven.
Corundum Vs Grossular Luster
A primary knowledge about Corundum vs Grossular 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. Corundum exhibits Adamantine and Vitreous luster. Grossular, on other hand, exhibits Greasy and Vitreous luster.