Gahnospinel Vs Alexandrite
Origin
Sri Lanka
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
Streak
Not Available
Not Available
For which Rashi?
Sagittarius, Scorpio
Scorpio
Element of Planets
Not Available
Earth
Energy
Projective
Projective, Receptive
Finger
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Ring Metal
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Deities
Hephaestus
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Not to wear with
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Planetary
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Talisman
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Tenacity
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Solubility
Not Available
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Durability
Not Available
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Specific Gravity
3.65-4.55
3.69-3.81
Fracture
ConchoidalArthur Thomas, Gemstones (2009)
Not Available
Cleavage
None, but may exhibit slight parting
1,1 ; 3,2.
Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
BeAl 2 O 4
Pleochroism
AbsentWalter Schumann
Not Available
Dispersion
Not Available
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Transparency
Gemmological Tables (2004)
Transparent, Transparent to nearly opaque
Refractive Index
1.735-1.790
1.739-1.770
Optic Character
Not Available
Biaxial/+
Crystal System
Isometric
Orthorhombic
Birefringence
Not Available
0.007-0.010
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
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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Gahnospinel Vs Alexandrite Fracture
Fracture is an important parameter when you compare Gahnospinel and Alexandrite Physical Properties. It is necessary to understand the significance of these properties, before you compare Gahnospinel 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 Gahnospinel is ConchoidalArthur Thomas and Gemstones (2009).
Gahnospinel Vs Alexandrite Luster
A primary knowledge about Gahnospinel 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. Gahnospinel exhibits Vitreous luster. Alexandrite, on other hand, exhibits Vitreous luster.