Origin
Not Available
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
Yellow, Black
Brown, pink, Violet, Yellow, Green, White, gray, Colorless, Green, gray, Brown, Red
For which Rashi?
Not Available
All
Planet
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Venus
Element of Planets
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Finger
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Ring Metal
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Energy
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Projective, Receptive
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
4.39
3.05-3.21
Fracture
ConchoidalGemdat.org, Uneven
Uneven, Subconchoidal, Uneven, Subconchoidal, Splintery, UnevenArthur Thomas, Gemstones (2009)
Cleavage
{111} Indistinct, {111} Indistinct, {111} Indistinct
Good on {110}, poor on {100}
Chemical Composition
Fe2+ Al 2O 4Gemdat.org , Management Team (2012)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth edition (2006) More from other references
Luster
Vitreous
Vitreous, Greasy
Pleochroism
Not Available
strongly trichroic
Transparency
Translucent
Transparent, Translucent
Refractive Index
1.80-1.83
1.627-1.650
Optic Character
Not Available
Not Available
Crystal System
Isometric Hexoctahedral H-M Symbol (4/m 3 2/m) Space Group: F d3m
Orthorhombic
Birefringence
Not Available
0.009-0.010
Clarity
Translucent
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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Hercynite Vs Andalusite Fracture
Fracture is an important parameter when you compare Hercynite and Andalusite Physical Properties. It is necessary to understand the significance of these properties, before you compare Hercynite 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 Hercynite is ConchoidalGemdat.org and Uneven. Andalusite fracture is Gemstones (2009), Splintery, Subconchoidal, Subconchoidal, Uneven, Uneven and UnevenArthur Thomas.
Hercynite Vs Andalusite Luster
A primary knowledge about Hercynite 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. Hercynite exhibits Vitreous luster. Andalusite, on other hand, exhibits Greasy and Vitreous luster.