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
Australia
Color
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Green, gray, Brown, Red
Yellow, Green, Blue
Streak
White
Not Available
For which Rashi?
All
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Planet
Venus
Not Available
Element of Planets
Not Available
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Finger
Not Available
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Ring Metal
Not Available
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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
Not Available
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Planetary
Not Available
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Talisman
Not Available
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Tenacity
Not Available
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Solubility
Not Available
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Durability
Not Available
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Specific Gravity
3.05-3.21
1.98-2.25
Fracture
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references
Cleavage
Good on {110}, poor on {100}
Not Available
Chemical Composition
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
SiO 2 · nH 2OGemdat.org , Management Team (2012)
Luster
Vitreous, Greasy
Not Available
Pleochroism
strongly trichroic
AbsentWalter Schumann
Transparency
Transparent, Translucent
Transparent, Translucent
Refractive Index
1.627-1.650
1.370-1.470
Optic Character
Not Available
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Crystal System
Orthorhombic
Not Available
Birefringence
0.009-0.010
Not Available
Clarity
Transparent
Transparent
Neurological
Not Available
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Cardiovascular
Not Available
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Respiratory
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Reproductive
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Digestive
Not Available
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Psychology
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Healing
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Qualities Associated
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Andalusite Vs Precious Opal Fracture
Fracture is an important parameter when you compare Andalusite and Precious Opal Physical Properties. It is necessary to understand the significance of these properties, before you compare Andalusite Vs Precious Opal 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. Precious Opal fracture is Conchoidal, Conchoidal and Gemstones of the world (2001) More from other references.
Andalusite Vs Precious Opal Luster
A primary knowledge about Andalusite vs Precious Opal 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.