Origin
Not Available, Southern and central Africa
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
Color
Violet, Black
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Green, gray, Brown, Red
Streak
gray, White, gray, White
White
For which Rashi?
Not Available
All
Planet
Not Available
Venus
Element of Planets
Not Available
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Finger
Not Available
Not Available
Ring Metal
Not Available
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Energy
Not Available
Projective, Receptive
Deities
Not Available
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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
3.17
3.05-3.21
Fracture
Handbook of mineralogy (2001)
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Cleavage
None
Good on {110}, poor on {100}
Chemical Composition
Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony et al , Handbook of mineralogy (2001)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Luster
Vitreous
Vitreous, Greasy
Pleochroism
Strong: pale lavender dark blueAnthony et al
strongly trichroic
Transparency
TranslucentAnthony et al, Translucent
Transparent, Translucent
Refractive Index
Not Available
1.627-1.650
Optic Character
Not Available
Not Available
Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Orthorhombic
Birefringence
Not Available
0.009-0.010
Clarity
TranslucentAnthony et al
Transparent
Neurological
Not Available
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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
Not Available
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Qualities Associated
Not Available
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Foitite Vs Andalusite Fracture
Fracture is an important parameter when you compare Foitite and Andalusite Physical Properties. It is necessary to understand the significance of these properties, before you compare Foitite Vs Andalusite 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 Foitite is Handbook of mineralogy (2001). Andalusite fracture is Gemstones (2009), Splintery, Subconchoidal, Subconchoidal, Uneven, Uneven and UnevenArthur Thomas.
Foitite Vs Andalusite Luster
A primary knowledge about Foitite vs Andalusite 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. Foitite exhibits Vitreous luster. Andalusite, on other hand, exhibits Greasy and Vitreous luster.