Gahnite Vs Vivianite
Origin
Australia
Southern and central Africa
Color
Blue, Green, Greenish, Black
Blue, Green, Colorless
For which Rashi?
Not Available
Not Available
Planet
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Element of Planets
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Finger
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Ring Metal
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Energy
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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
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Specific Gravity
4.00-4.62
2.64-2.70
Fracture
Conchoidal, Uneven
(e.g. graphite).
Cleavage
Indistinct parting on [111]
{010} Perfect
Mohs Hardness
7.5-8
Not Available
Chemical Composition
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Luster
Vitreous
Vitreous, Pearly
Pleochroism
Not Available
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael OâDonoghue
Dispersion
Not Available
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Transparency
Gemmological Tables (2004) More from other references
Transparent
Refractive Index
1.790-1.818
1.560-1.640
Optic Character
Not Available
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Crystal System
cubic
Not Available
Birefringence
Not Available
0.054-0.075
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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Gahnite Vs Vivianite Fracture
Fracture is an important parameter when you compare Gahnite and Vivianite Physical Properties. It is necessary to understand the significance of these properties, before you compare Gahnite Vs Vivianite 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 Gahnite is Conchoidal and Uneven. Vivianite fracture is (e.g. graphite)..
Gahnite Vs Vivianite Luster
A primary knowledge about Gahnite vs Vivianite 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. Gahnite exhibits Vitreous luster. Vivianite, on other hand, exhibits Pearly and Vitreous luster.