Star Sapphire Vs Andradite
Origin
Southern and central Africa
Italy, Russia
Color
Yellow, Green, Blue, Violet
Colorless, Green, Black, Brown, Red, Greenish, Yellow, gray
Streak
Not Available
White
For which Rashi?
Not Available
Not Available
Planet
Not Available
Not Available
Element of Planets
Not Available
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Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Energy
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Deities
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Not to wear with
Not Available
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Powers
Not Available
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Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.90-4.05
3.70-4.10
Fracture
Not Available
Conchoidal, Uneven, Conchoidal, Brittle, ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Not Available
none
Mohs Hardness
Not Available
6.5-7
Chemical Composition
Al 2O 3Ulrich Henn and Claudio C.
Ca 3Fe 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Luster
Not Available
Adamantine, Resinous
Pleochroism
Not Available
Not Available
Transparency
Transparent, Translucent
Transparent
Refractive Index
1.758-1.780
1.88-1.94
Optic Character
Not Available
Not Available
Crystal System
Not Available
cubic
Birefringence
0.007-0.010
0.057
Clarity
Transparent
Transparent
Neurological
Not Available
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Cardiovascular
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Respiratory
Not Available
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Reproductive
Not Available
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Digestive
Not Available
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Psychology
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Healing
Not Available
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Qualities Associated
Not Available
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Star Sapphire Vs Andradite Fracture
Fracture is an important parameter when you compare Star Sapphire and Andradite Physical Properties. It is necessary to understand the significance of these properties, before you compare Star Sapphire Vs Andradite 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. Andradite fracture is Brittle, Conchoidal, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009) and Uneven.
Star Sapphire Vs Andradite Luster
A primary knowledge about Star Sapphire vs Andradite 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. Andradite, on other hand, exhibits Adamantine and Resinous luster.