Gahnite Vs Common Opal
Origin
Australia
Southern and central Africa
Color
Blue, Green, Greenish, Black
White, Colorless, Blue, Red, Green, Yellow, Violet
Streak
Grey, gray
Not Available
For which Rashi?
Not Available
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Planet
Not Available
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Element of Planets
Not Available
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Finger
Not Available
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Ring Metal
Not Available
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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
Not Available
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Solubility
Not Available
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Durability
Not Available
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Specific Gravity
4.00-4.62
1.98-2.50
Fracture
Conchoidal, Uneven
Conchoidal, Conchoidal, Gemstones of the world (2001)
Cleavage
Indistinct parting on [111]
Not Available
Mohs Hardness
7.5-8
5.5-6.5
Chemical Composition
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
SiO 2 · nH 2OWalter Schumann , Gemstones of the world (2001)
Luster
Vitreous
Not Available
Pleochroism
Not Available
AbsentWalter Schumann
Dispersion
Not Available
None
Transparency
Gemmological Tables (2004) More from other references
Translucent
Refractive Index
1.790-1.818
1.37-1.52
Optic Character
Not Available
Not Available
Crystal System
cubic
Not Available
Birefringence
Not Available
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Clarity
TransparentUlrich Henn and Claudio C. Milisenda
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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Gahnite Vs Common Opal Fracture
Fracture is an important parameter when you compare Gahnite and Common Opal Physical Properties. It is necessary to understand the significance of these properties, before you compare Gahnite Vs Common Opal 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. Common Opal fracture is Conchoidal, Conchoidal and Gemstones of the world (2001).
Gahnite Vs Common Opal Luster
A primary knowledge about Gahnite vs Common Opal 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.