Neptunite Vs Sillimanite
Origin
USA
USA, Madagascar, India, Sri Lanka, Burma, Australia, Italy, Brazil
Color
Black, Red, Brown
Blue, Green, Brownish, Greenish, Colorless, gray
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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Solubility
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Durability
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Specific Gravity
3.19-3.23
3.20-3.26
Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Brittle
Splintery
Cleavage
{110} good
{010} perfect
Chemical Composition
KNa 2Li(Fe2+ ,Mn2+ ) 2Ti 2Si 8O 24Michael OâDonoghue , Gems, Sixth Edition (2006)
Al 2SiO 5Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous
Vitreous, Subadamantine, Silky
Pleochroism
x=yellow-orange
Colourless to pale brown to yellow
Dispersion
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Transparency
Translucent
Transparent, Translucent
Refractive Index
1.692-1.734
1.653-1.685
Optic Character
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Crystal System
monoclinic
Orthorhombic
Birefringence
0.0294-0.0452
0.020-0.022
Clarity
Translucent
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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Neptunite Vs Sillimanite Fracture
Fracture is an important parameter when you compare Neptunite and Sillimanite Physical Properties. It is necessary to understand the significance of these properties, before you compare Neptunite Vs Sillimanite 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 Neptunite is Brittle, Conchoidal, ConchoidalAnthony et al and Handbook of mineralogy (2001). Sillimanite fracture is Splintery.
Neptunite Vs Sillimanite Luster
A primary knowledge about Neptunite vs Sillimanite 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. Neptunite exhibits Vitreous luster. Sillimanite, on other hand, exhibits Silky, Subadamantine and Vitreous luster.