Corundum Vs Grandidierite
Origin
Southern and central Africa
Madagascar
Color
Violet, Blue, Red, Yellow, Brown, gray
Green
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
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Durability
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Specific Gravity
3.90-4.05
2.85-3.00
Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
Cleavage
None – parting in 3 directions
Perfect
Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Luster
Adamantine, Vitreous
Vitreous, Pearly
Transparency
Transparent, Translucent
Gemmological Tables (2004) More from other references
Refractive Index
1.758-1.780
1.578-1.639
Optic Character
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Crystal System
Trigonal
Orthorhombic
Birefringence
0.007-0.010
0.037-0.039
Clarity
Gemmological Tables (2004) More from other references
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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Corundum Vs Grandidierite Fracture
Fracture is an important parameter when you compare Corundum and Grandidierite Physical Properties. It is necessary to understand the significance of these properties, before you compare Corundum Vs Grandidierite 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. Grandidierite fracture is Brittle, Brittle, Gemstones (2009), Uneven and UnevenArthur Thomas.
Corundum Vs Grandidierite Luster
A primary knowledge about Corundum vs Grandidierite 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. Grandidierite, on other hand, exhibits Pearly and Vitreous luster.