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
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Color
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Green, gray, Brown, Red
Black, Blue, Yellow, Green
Streak
White
Grey, Greenish, Brown
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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Brittle
Solubility
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Durability
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Specific Gravity
3.05-3.21
3.28-3.44
Fracture
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Uneven, Splintery, Brittle
Cleavage
Good on {110}, poor on {100}
Perfect on {110}, intersecting at 56° and 124°; partings on {100} and {010}
Mohs Hardness
7.5
5.0-6.0
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
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Luster
Vitreous, Greasy
Vitreous, Silky
Pleochroism
strongly trichroic
X = blue
Transparency
Transparent, Translucent
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Refractive Index
1.627-1.650
1.680-1.698
Optic Character
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Crystal System
Orthorhombic
monoclinic
Birefringence
0.009-0.010
0.005-0.008
Clarity
Transparent
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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 Riebeckite Fracture
Fracture is an important parameter when you compare Andalusite and Riebeckite Physical Properties. It is necessary to understand the significance of these properties, before you compare Andalusite Vs Riebeckite 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. Riebeckite fracture is Brittle, Splintery and Uneven.
Andalusite Vs Riebeckite Luster
A primary knowledge about Andalusite vs Riebeckite 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. Riebeckite, on other hand, exhibits Silky and Vitreous luster.