Gahnite Vs Neptunite
Color
Blue, Green, Greenish, Black
Black, Red, Brown
Streak
Grey, gray
Brown, Red
For which Rashi?
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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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Brittle
Solubility
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Durability
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Specific Gravity
4.00-4.62
3.19-3.23
Fracture
Conchoidal, Uneven
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Cleavage
Indistinct parting on [111]
{110} good
Chemical Composition
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
Pleochroism
Not Available
x=yellow-orange
Dispersion
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Transparency
Gemmological Tables (2004) More from other references
Translucent
Refractive Index
1.790-1.818
1.692-1.734
Optic Character
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Crystal System
cubic
monoclinic
Birefringence
Not Available
0.0294-0.0452
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Translucent
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 Neptunite Fracture
Fracture is an important parameter when you compare Gahnite and Neptunite Physical Properties. It is necessary to understand the significance of these properties, before you compare Gahnite Vs Neptunite 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. Neptunite fracture is Brittle, Conchoidal, ConchoidalAnthony et al and Handbook of mineralogy (2001).
Gahnite Vs Neptunite Luster
A primary knowledge about Gahnite vs Neptunite 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. Neptunite, on other hand, exhibits Vitreous luster.