Origin
Canada, USA, Brazil, Italy, Mozambique, Zimbabwe, Russia, Burma, Australia
Canada, Russia
Color
Colorless, gray, Yellow, White
Brown, Yellow, Greenish, Brown, Yellow, Greenish, Brown, Brownish, Red, Yellow
Streak
Colorless
Brown, White, Brown, White
For which Rashi?
Not Available
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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
Brittle
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Solubility
insoluble
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Durability
Not Available
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Specific Gravity
2.40
3.2-3.4
Fracture
Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Conchoidal
Uneven, Brittle, Metallic
Cleavage
Perfect on {001}, poor on {201} with 38.5° angle between the two
Perfect on [001] imperfect on [100]
Chemical Composition
LiAlSi 4O 10Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
(K,Na) 3(Fe2+ ,Mn) 7Ti 2Si 8O 24(O,OH) 7Anthony et al , Handbook of mineralogy (2001)
Luster
Vitreous, Pearly
Greasy, Pearly
Pleochroism
AbsentWalter Schumann
Strong: X= deep red-orange Y= orange-yellow Z= lemon-yellow
Transparency
Gemmological Tables (2004) More from other references
Translucent
Refractive Index
1.502-1.523
1.678-1.758
Optic Character
Not Available
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Crystal System
monoclinic
Triclinic
Birefringence
0.012-0.016
0.050
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Translucent
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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Petalite Vs Astrophyllite Fracture
Fracture is an important parameter when you compare Petalite and Astrophyllite Physical Properties. It is necessary to understand the significance of these properties, before you compare Petalite Vs Astrophyllite 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 Petalite is Subconchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Brittle and Conchoidal. Astrophyllite fracture is Uneven, Brittle and Metallic.
Petalite Vs Astrophyllite Luster
A primary knowledge about Petalite vs Astrophyllite 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. Petalite exhibits Vitreous and Pearly luster. Astrophyllite, on other hand, exhibits Greasy and Pearly luster.
