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