Corundum Vs Astrophyllite
Origin
Southern and central Africa
Canada, Russia
Color
Violet, Blue, Red, Yellow, Brown, gray
Brown, Yellow, Greenish, Brown, Yellow, Greenish, Brown, Brownish, Red, Yellow
Streak
White, None
Brown, White, Brown, 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
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Durability
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Specific Gravity
3.90-4.05
3.2-3.4
Fracture
Uneven, Uneven, Gems, Difficult, Fibrous
Uneven, Brittle, Metallic
Cleavage
None – parting in 3 directions
Perfect on [001] imperfect on [100]
Chemical Composition
Al 2O 3Arthur Thomas , Gemstones (2009)
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Luster
Adamantine, Vitreous
Greasy, Pearly
Pleochroism
None
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
Transparency
Transparent, Translucent
Translucent
Refractive Index
1.758-1.780
1.678-1.758
Optic Character
Not Available
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Crystal System
Trigonal
Triclinic
Birefringence
0.007-0.010
0.050
Clarity
Gemmological Tables (2004) More from other references
Translucent
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 Astrophyllite Fracture
Fracture is an important parameter when you compare Corundum and Astrophyllite Physical Properties. It is necessary to understand the significance of these properties, before you compare Corundum Vs Astrophyllite 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. Astrophyllite fracture is Brittle, Metallic and Uneven.
Corundum Vs Astrophyllite Luster
A primary knowledge about Corundum vs Astrophyllite 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. Astrophyllite, on other hand, exhibits Greasy and Pearly luster.