Covellite Vs Gahnite
Color
Blue, Black
Blue, Green, Greenish, Black
Streak
Grey, Black, gray
Grey, gray
For which Rashi?
Not Available
Not Available
Planet
Not Available
Not Available
Element of Planets
Not Available
Not Available
Energy
Not Available
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Deities
Not Available
Not Available
Not to wear with
Not Available
Not Available
Powers
Not Available
Not Available
Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Tenacity
Flexible
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
4.6-4.76
4.00-4.62
Fracture
Gemstones (2009), UnevenArthur Thomas, Brittle, Metallic
Conchoidal, Uneven
Cleavage
Perfect on {0001}
Indistinct parting on [111]
Mohs Hardness
Not Available
7.5-8
Chemical Composition
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Pleochroism
Marked
Not Available
Dispersion
Not Available
Not Available
Transparency
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references
Gemmological Tables (2004) More from other references
Refractive Index
1.45-2.62
1.790-1.818
Optic Character
Not Available
Not Available
Crystal System
Hexagonal
cubic
Birefringence
Not Available
Not Available
Clarity
OpaqueAnthony et al
TransparentUlrich Henn and Claudio C. Milisenda
Neurological
Not Available
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Cardiovascular
Not Available
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Respiratory
Not Available
Not Available
Reproductive
Not Available
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Digestive
Not Available
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Psychology
Not Available
Not Available
Healing
Not Available
Not Available
Qualities Associated
Not Available
Not Available
Covellite Vs Gahnite Fracture
Fracture is an important parameter when you compare Covellite and Gahnite Physical Properties. It is necessary to understand the significance of these properties, before you compare Covellite 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. Fracture observed in Covellite is Gemstones (2009), UnevenArthur Thomas, Brittle and Metallic. Gahnite fracture is Conchoidal and Uneven.
Covellite Vs Gahnite Luster
A primary knowledge about Covellite 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. Covellite exhibits Resinous luster. Gahnite, on other hand, exhibits Vitreous luster.