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
Yellow, Brown, Black, orange
Streak
White
Yellow, White
For which Rashi?
All
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Planet
Venus
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Element of Planets
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Energy
Projective, Receptive
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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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Moderately flexible
Solubility
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Durability
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Specific Gravity
3.05-3.21
2.32
Fracture
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Flexible Flexible fragments.
Cleavage
Good on {110}, poor on {100}
Perfect on {0001}
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
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Luster
Vitreous, Greasy
Vitreous
Pleochroism
strongly trichroic
Distinct
Transparency
Transparent, Translucent
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Refractive Index
1.627-1.650
1.546
Optic Character
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Crystal System
Orthorhombic
Trigonal
Birefringence
0.009-0.010
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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 Shigaite Fracture
Fracture is an important parameter when you compare Andalusite and Shigaite Physical Properties. It is necessary to understand the significance of these properties, before you compare Andalusite Vs Shigaite 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 Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas and Gemstones (2009). Shigaite fracture is Flexible Flexible fragments..
Andalusite Vs Shigaite Luster
A primary knowledge about Andalusite vs Shigaite 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 Vitreous and Greasy luster. Shigaite, on other hand, exhibits Vitreous luster.