Oligoclase Vs Covellite
Origin
Southern and central Africa
Mexico
Color
Colorless, Brown, Greenish, gray
Blue, Blue, Black
Streak
White
Grey, Black, gray
For which Rashi?
Not Available
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Planet
Not Available
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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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Flexible
Solubility
Not Available
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Durability
Not Available
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Specific Gravity
2.62-2.67
4.6-4.76
Fracture
Gems, Sixth Edition (2006), Gems, Sixth Edition (2006), Uneven
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
Cleavage
From the Greek, oligos and kasein, little cleavage.
Perfect on {0001}
Mohs Hardness
6-6.5
Not Available
Chemical Composition
Na(90-70%)Ca(10-30%)(Al,Si)AlSi 2O 8Michael OâDonoghue , Gems, Sixth Edition (2006)
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Pleochroism
Not Available
Marked
Dispersion
Not Available
Not Available
Transparency
Gemmological Tables (2004)
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references
Refractive Index
1.538-1.550
1.45-2.62
Optic Character
Not Available
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Crystal System
Not Available
Hexagonal
Birefringence
0.010
Not Available
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
OpaqueAnthony et al
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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Oligoclase Vs Covellite Fracture
Fracture is an important parameter when you compare Oligoclase and Covellite Physical Properties. It is necessary to understand the significance of these properties, before you compare Oligoclase 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 Oligoclase is Gems, Gems, Sixth Edition (2006), Sixth Edition (2006) and Uneven. Covellite fracture is Brittle, Gemstones (2009), Gemstones (2009), Metallic and UnevenArthur Thomas.
Oligoclase Vs Covellite Luster
A primary knowledge about Oligoclase 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. Oligoclase exhibits Vitreous luster. Covellite, on other hand, exhibits Resinous luster.