Powellite Vs Petalite
Origin
India
Canada, USA, Brazil, Italy, Mozambique, Zimbabwe, Russia, Burma, Australia
Color
Yellow, Greenish, Blue, Brown, Green, gray
Colorless, gray, Yellow, White
For which Rashi?
Not Available
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Planet
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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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Brittle
Solubility
Not Available
insoluble
Durability
Not Available
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Specific Gravity
4.23
2.40
Fracture
UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Cleavage
{111} Distinct
Perfect on {001}, poor on {201} with 38.5° angle between the two
Mohs Hardness
3.5-4
6-6.5
Chemical Composition
CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Greasy, Subadamantine
Vitreous, Pearly
Pleochroism
In deeply colored specimens: blue greenAnthony et al
AbsentWalter Schumann
Transparency
Transparent
Gemmological Tables (2004) More from other references
Refractive Index
1.974-1.984
1.502-1.523
Optic Character
Not Available
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Crystal System
Not Available
monoclinic
Birefringence
Not Available
0.012-0.016
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
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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Powellite Vs Petalite Fracture
Fracture is an important parameter when you compare Powellite and Petalite Physical Properties. It is necessary to understand the significance of these properties, before you compare Powellite Vs Petalite 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 Powellite is Brittle, Conchoidal, Handbook of mineralogy (2001), Handbook of mineralogy (2001), UnevenAnthony et al and UnevenAnthony et al. Petalite fracture is Brittle, Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references and Subconchoidal.
Powellite Vs Petalite Luster
A primary knowledge about Powellite vs Petalite 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. Powellite exhibits Greasy and Subadamantine luster. Petalite, on other hand, exhibits Pearly and Vitreous luster.