Biotite Vs Alexandrite
Origin
Not Available
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, Yellow, White, Brown, Greenish, Yellow, White
Green
Streak
White, gray
Not Available
For which Rashi?
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Scorpio
Planet
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Venus
Element of Planets
Not Available
Earth
Finger
Not Available
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Ring Metal
Not Available
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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
2.7-3.3
3.69-3.81
Fracture
Uneven, Even, Yellow, White
Not Available
Cleavage
Perfect on the {001}
1,1 ; 3,2.
Mohs Hardness
2.5-3.0
8.5
Chemical Composition
K(Mg,Fe++)3[AlSi3O10(OH,F)2
BeAl 2 O 4
Luster
Vitreous, Pearly
Vitreous
Pleochroism
Strong
Not Available
Dispersion
Not Available
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Transparency
Not Available
Transparent, Transparent to nearly opaque
Refractive Index
1.565-1.625
1.739-1.770
Optic Character
Not Available
Biaxial/+
Crystal System
monoclinic
Orthorhombic
Birefringence
0.03-0.07
0.007-0.010
Clarity
Not Available
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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Biotite Vs Alexandrite Fracture
Fracture is an important parameter when you compare Biotite and Alexandrite Physical Properties. It is necessary to understand the significance of these properties, before you compare Biotite 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 Biotite is Even, Uneven, White and Yellow.
Biotite Vs Alexandrite Luster
A primary knowledge about Biotite 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. Biotite exhibits Pearly and Vitreous luster. Alexandrite, on other hand, exhibits Vitreous luster.