Howlite Vs Covellite
Origin
Southern and central Africa
Mexico
Color
Blue, Colorless, White
Blue, Blue, Black
Streak
White
Grey, Black, gray
For which Rashi?
Gemini, Virgo, Gemini, Virgo, Gemini, Virgo
Not Available
Planet
Moon
Not Available
Element of Planets
Earth
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Energy
Not Available
Not Available
Deities
Quan Yin
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
Not Available
Flexible
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.45-2.58
4.6-4.76
Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Metallic
Cleavage
None
Perfect on {0001}
Mohs Hardness
3-3.5
Not Available
Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CuSMichael OâDonoghue , Gems, Sixth edition (2006) More from other references
Pleochroism
NilArthur Thomas
Marked
Dispersion
Not Available
Not Available
Transparency
Gemmological Tables (2004) More from other references
OpaqueAnthony et al, Handbook of mineralogy (2001) More from other references
Refractive Index
1.583-1.608
1.45-2.62
Optic Character
Not Available
Not Available
Crystal System
monoclinic
Hexagonal
Birefringence
0.019
Not Available
Clarity
Gemmological Tables (2004) More from other references
OpaqueAnthony et al
Neurological
Not Available
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Cardiovascular
Not Available
Not Available
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
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Howlite Vs Covellite Fracture
Fracture is an important parameter when you compare Howlite and Covellite Physical Properties. It is necessary to understand the significance of these properties, before you compare Howlite 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 Howlite is Brittle, Conchoidal, Gemstones (2009), Gemstones (2009), UnevenArthur Thomas and UnevenArthur Thomas. Covellite fracture is Brittle, Gemstones (2009), Gemstones (2009), Metallic and UnevenArthur Thomas.
Howlite Vs Covellite Luster
A primary knowledge about Howlite 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. Howlite exhibits Vitreous luster. Covellite, on other hand, exhibits Resinous luster.