Origin
Spain, Brazil, USA, Sri Lanka, Burma, Color: strongly pleochroic, reddish brown, pink / yellowish green, Hardness: 7 7.5, Refractive index: 1.63 1.65, Density: 3.13 3.21, Chemical composition: Al2SiO5, Crystal structure: orthorhombic, Lustre: vitreous, greasy, Origins: Spain, Brazil, USA, Sri Lanka, Burma. Discovered in Andalusia (Spain), the andalusite stone is relatively rare, with big crystals over 10 ct. especially rare. Due to its remarkable pleochroism effect, the stone is highly valued by collectors., brown
Afghanistan
Color
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Green, gray, Brown, Red
White, Colorless, Blue, Red, Green, Yellow, Violet, pink
For which Rashi?
All
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Planet
Venus
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Element of Planets
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Finger
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Ring Metal
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Energy
Projective, Receptive
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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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Solubility
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Durability
Not Available
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Specific Gravity
3.05-3.21
2.90-3.14
Fracture
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Brittle
Cleavage
Good on {110}, poor on {100}
Imperfect; basal
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
(Be,Cs) 3Al 2Si 6O 18 · 0.5H 2OUlrich Henn and Claudio C.
Luster
Vitreous, Greasy
Vitreous
Pleochroism
strongly trichroic
Moderate dichroic
Transparency
Transparent, Translucent
Transparent
Refractive Index
1.627-1.650
1.598-1.620
Optic Character
Not Available
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Crystal System
Orthorhombic
Hexagonal
Birefringence
0.009-0.010
0.008-0.011
Clarity
Transparent
Transparent
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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Andalusite Vs Pezzottaite Fracture
Fracture is an important parameter when you compare Andalusite and Pezzottaite Physical Properties. It is necessary to understand the significance of these properties, before you compare Andalusite Vs Pezzottaite 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 Andalusite is Gemstones (2009), Splintery, Subconchoidal, Subconchoidal, Uneven, Uneven and UnevenArthur Thomas. Pezzottaite fracture is Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009) and Uneven.
Andalusite Vs Pezzottaite Luster
A primary knowledge about Andalusite vs Pezzottaite 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. Andalusite exhibits Greasy and Vitreous luster. Pezzottaite, on other hand, exhibits Vitreous luster.