Staurolite Vs Alexandrite
Origin
Switzerland
Russia, Brazil, Tanzania, Madagascar, Zambia, Sri Lanka, Burma, India, Color: color change, from bluish green (daylight) to purple, red or brown (incandescent light), Hardness: 8, Refractive index: 1.74 1.77, Density: 3.68 3.80, Chemical composition: BeAl2O4, Crystal structure: orthorhombic, Origins: Russia, Brazil, Tanzania, Madagascar, Zambia, Sri Lanka, Burma
Color
Brown, Brownish, Yellow, Black, Reddish
Green
Streak
White, gray
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For which Rashi?
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Scorpio
Planet
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Venus
Element of Planets
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Earth
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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Love
Planetary
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Talisman
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Tenacity
Brittle
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Solubility
Not Available
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Durability
Not Available
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Specific Gravity
3.7-3.8
3.69-3.81
Fracture
Subconchoidal, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Not Available
Cleavage
Distinct on {010}
1,1 ; 3,2.
Chemical Composition
(Fe,Mg,Zn) 2Al 9(Si,Al) 4O 22(OH) 2Ulrich Henn and Claudio C.
BeAl 2 O 4
Pleochroism
X = colorless; Y = pale yellow; Z = golden yellow
Not Available
Dispersion
Not Available
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Transparency
Blue Chart Gem Identification (2010) More from other references
Transparent, Transparent to nearly opaque
Refractive Index
1.736-1.762
1.739-1.770
Optic Character
Not Available
Biaxial/+
Crystal System
monoclinic
Orthorhombic
Birefringence
0.009-0.015
0.007-0.010
Clarity
Blue Chart Gem Identification (2010) More from other references
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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Staurolite Vs Alexandrite Fracture
Fracture is an important parameter when you compare Staurolite and Alexandrite Physical Properties. It is necessary to understand the significance of these properties, before you compare Staurolite Vs Alexandrite 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 Staurolite is Brittle, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009) and Subconchoidal.
Staurolite Vs Alexandrite Luster
A primary knowledge about Staurolite vs Alexandrite 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. Staurolite exhibits Resinous luster. Alexandrite, on other hand, exhibits Vitreous luster.