Howlite Vs Powellite
Origin
Southern and central Africa
India
Color
Blue, Colorless, White
Yellow, Greenish, Blue, Brown, Green, gray
For which Rashi?
Gemini, Virgo, Gemini, Virgo, Gemini, Virgo
Not Available
Planet
Moon
Not Available
Element of Planets
Earth
Not Available
Energy
Not Available
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Finger
Not Available
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Ring Metal
Not Available
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Deities
Quan Yin
Not Available
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
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Solubility
Not Available
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Durability
Not Available
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Specific Gravity
2.45-2.58
4.23
Fracture
UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle, Conchoidal
UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
None
{111} Distinct
Mohs Hardness
3-3.5
3.5-4
Chemical Composition
Ca 2B 5SiO 9(OH) 5Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous
Greasy, Subadamantine
Pleochroism
NilArthur Thomas
In deeply colored specimens: blue greenAnthony et al
Dispersion
Not Available
Not Available
Transparency
Gemmological Tables (2004) More from other references
Transparent
Refractive Index
1.583-1.608
1.974-1.984
Optic Character
Not Available
Not Available
Crystal System
monoclinic
Not Available
Birefringence
0.019
Not Available
Clarity
Gemmological Tables (2004) More from other references
Transparent
Neurological
Not Available
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Cardiovascular
Not Available
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Respiratory
Not Available
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Reproductive
Not Available
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Digestive
Not Available
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Psychology
Not Available
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Healing
Not Available
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Qualities Associated
Not Available
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Howlite Vs Powellite Fracture
Fracture is an important parameter when you compare Howlite and Powellite Physical Properties. It is necessary to understand the significance of these properties, before you compare Howlite Vs Powellite 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 UnevenArthur Thomas, Gemstones (2009), UnevenArthur Thomas, Gemstones (2009), Brittle and Conchoidal. Powellite fracture is UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle and Conchoidal.
Howlite Vs Powellite Luster
A primary knowledge about Howlite vs Powellite 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. Powellite, on other hand, exhibits Greasy and Subadamantine luster.
