Brazilianite Vs Covellite
Color
Green, Colorless, Greenish, Yellow, Green
Blue, Blue, Black
Streak
White
Grey, Black, 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
Not Available
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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
Flexible
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.98-2.99
4.6-4.76
Fracture
Conchoidal, Gems
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
Cleavage
(010) Distinct to good
Perfect on {0001}
Mohs Hardness
5.5
Not Available
Chemical Composition
NaAl 3(PO 4) 2(OH) 4Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Pleochroism
Very weakWalter Schumann
Marked
Transparency
Gemmological Tables (2004) More from other references
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references
Refractive Index
1.602-1.625
1.45-2.62
Optic Character
Not Available
Not Available
Crystal System
monoclinic
Hexagonal
Birefringence
0.019-0.021
Not Available
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
OpaqueAnthony et al
Neurological
Not Available
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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
Not Available
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Brazilianite Vs Covellite Fracture
Fracture is an important parameter when you compare Brazilianite and Covellite Physical Properties. It is necessary to understand the significance of these properties, before you compare Brazilianite Vs Covellite 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 Brazilianite is Conchoidal and Gems. Covellite fracture is Brittle, Gemstones (2009), Gemstones (2009), Metallic and UnevenArthur Thomas.
Brazilianite Vs Covellite Luster
A primary knowledge about Brazilianite vs Covellite 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. Brazilianite exhibits Vitreous luster. Covellite, on other hand, exhibits Resinous luster.