Star Sapphire Vs Gahnite
Origin
Southern and central Africa
Australia
Color
Yellow, Green, Blue, Violet
Blue, Green, Greenish, Black
Streak
Not Available
Grey, gray
For which Rashi?
Not Available
Not Available
Planet
Not Available
Not Available
Element of Planets
Not Available
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Energy
Not Available
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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
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Talisman
Not Available
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Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.90-4.05
4.00-4.62
Fracture
Not Available
Conchoidal, Uneven
Cleavage
Not Available
Indistinct parting on [111]
Mohs Hardness
Not Available
7.5-8
Chemical Composition
Al 2O 3Ulrich Henn and Claudio C.
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Not Available
Vitreous
Pleochroism
Not Available
Not Available
Dispersion
Not Available
Not Available
Transparency
Transparent, Translucent
Gemmological Tables (2004) More from other references
Refractive Index
1.758-1.780
1.790-1.818
Optic Character
Not Available
Not Available
Crystal System
Not Available
cubic
Birefringence
0.007-0.010
Not Available
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
Neurological
Not Available
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Cardiovascular
Not Available
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Respiratory
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Reproductive
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Digestive
Not Available
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Psychology
Not Available
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Healing
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Qualities Associated
Not Available
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Star Sapphire Vs Gahnite Fracture
Fracture is an important parameter when you compare Star Sapphire and Gahnite Physical Properties. It is necessary to understand the significance of these properties, before you compare Star Sapphire Vs Gahnite 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. Gahnite fracture is Conchoidal and Uneven.
Star Sapphire Vs Gahnite Luster
A primary knowledge about Star Sapphire vs Gahnite 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. Gahnite, on other hand, exhibits Vitreous luster.