Origin
Australia
Canada, USA, Brazil, Italy, Mozambique, Zimbabwe, Russia, Burma, Australia
Color
Colorless, White, Brownish, Yellow, Brown
Colorless, gray, Yellow, White
For which Rashi?
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Planet
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Element of Planets
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Energy
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Finger
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Ring Metal
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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
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2.40
Fracture
ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Cleavage
None
Perfect on {001}, poor on {201} with 38.5° angle between the two
Mohs Hardness
7-7.5
6-6.5
Chemical Composition
Al 4(Ta,Nb) 3(O,OH,F) 14Ulrich Henn and Claudio C.
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Adamantine
Vitreous, Pearly
Pleochroism
NilArthur Thomas
AbsentWalter Schumann
Transparency
Gemmological Tables (2004) More from other references
Gemmological Tables (2004) More from other references
Refractive Index
1.994-2.040
1.502-1.523
Optic Character
Not Available
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Crystal System
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monoclinic
Birefringence
0.046
0.012-0.016
Clarity
Gemmological Tables (2004) More from other references
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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Simpsonite Vs Petalite Fracture
Fracture is an important parameter when you compare Simpsonite and Petalite Physical Properties. It is necessary to understand the significance of these properties, before you compare Simpsonite 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 Simpsonite is ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle and Conchoidal. Petalite fracture is Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle and Conchoidal.
Simpsonite Vs Petalite Luster
A primary knowledge about Simpsonite 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. Simpsonite exhibits Adamantine luster. Petalite, on other hand, exhibits Vitreous and Pearly luster.