Gahnite Vs London blue topaz
Origin
Australia
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Color
Blue, Green, Greenish, Black
White, Colorless, Blue, Red, Green, Yellow, Violet
Streak
Grey, gray
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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
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Solubility
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Durability
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Specific Gravity
4.00-4.62
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Fracture
Conchoidal, Uneven
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Cleavage
Indistinct parting on [111]
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Mohs Hardness
7.5-8
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Chemical Composition
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
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Luster
Vitreous
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Pleochroism
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Dispersion
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Transparency
Gemmological Tables (2004) More from other references
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Refractive Index
1.790-1.818
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Optic Character
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Crystal System
cubic
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Birefringence
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Clarity
TransparentUlrich Henn and Claudio C. Milisenda
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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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Gahnite Vs London blue topaz Fracture
Fracture is an important parameter when you compare Gahnite and London blue topaz Physical Properties. It is necessary to understand the significance of these properties, before you compare Gahnite Vs London blue topaz 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 Gahnite is Conchoidal and Uneven.
Gahnite Vs London blue topaz Luster
A primary knowledge about Gahnite vs London blue topaz 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 exhibits Vitreous luster.