Pargasite Vs Petalite
Origin
Southern and central Africa, Vietnam
Canada, USA, Brazil, Italy, Mozambique, Zimbabwe, Russia, Burma, Australia
Color
Green, Black, Brown
Colorless, gray, Yellow, White
For which Rashi?
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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
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insoluble
Durability
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Specific Gravity
3.04-3.26
2.40
Fracture
Splintery, Brittle, Uneven
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Cleavage
{110} perfect
Perfect on {001}, poor on {201} with 38.5° angle between the two
Chemical Composition
NaCa 2(Mg 4Al)Si 6Al 2O 22(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006)
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Vitreous
Vitreous, Pearly
Pleochroism
Not Available
AbsentWalter Schumann
Transparency
Transparent
Gemmological Tables (2004) More from other references
Refractive Index
1.613-1.663
1.502-1.523
Optic Character
Not Available
Not Available
Crystal System
monoclinic
monoclinic
Birefringence
0.020
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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Pargasite Vs Petalite Fracture
Fracture is an important parameter when you compare Pargasite and Petalite Physical Properties. It is necessary to understand the significance of these properties, before you compare Pargasite 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 Pargasite is Brittle, Splintery and Uneven. Petalite fracture is Brittle, Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references and Subconchoidal.
Pargasite Vs Petalite Luster
A primary knowledge about Pargasite 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. Pargasite exhibits Vitreous luster. Petalite, on other hand, exhibits Pearly and Vitreous luster.