Grandidierite Vs Neptunite
Color
Green
Black, Red, Brown
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
2.85-3.00
3.19-3.23
Fracture
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Cleavage
Perfect
{110} good
Chemical Composition
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous, Pearly
Vitreous
Pleochroism
visible
x=yellow-orange
Dispersion
Not Available
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Transparency
Gemmological Tables (2004) More from other references
Translucent
Refractive Index
1.578-1.639
1.692-1.734
Optic Character
Not Available
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Crystal System
Orthorhombic
monoclinic
Birefringence
0.037-0.039
0.0294-0.0452
Clarity
Gemmological Tables (2004) More from other references
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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Grandidierite Vs Neptunite Fracture
Fracture is an important parameter when you compare Grandidierite and Neptunite Physical Properties. It is necessary to understand the significance of these properties, before you compare Grandidierite 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 Grandidierite is Brittle, Brittle, Gemstones (2009), Uneven and UnevenArthur Thomas. Neptunite fracture is Brittle, Conchoidal, ConchoidalAnthony et al and Handbook of mineralogy (2001).
Grandidierite Vs Neptunite Luster
A primary knowledge about Grandidierite 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. Grandidierite exhibits Pearly and Vitreous luster. Neptunite, on other hand, exhibits Vitreous luster.