Lapis lazuli Vs Nuummite
Origin
Afghanistan
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Color
Violet, Blue, White
Green
Streak
Blue
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For which Rashi?
Sagittarius
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Planet
Venus
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Element of Planets
Water
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Finger
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Ring Metal
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Energy
Receptive
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Deities
Venus
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Not to wear with
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Powers
Protection, Courage
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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
2.50-3.00
3.18-3.37
Fracture
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Conchoidal
Cleavage
3,6
Perfect on 210
Chemical Composition
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
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Luster
Vitreous, Greasy
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Pleochroism
AbsentWalter Schumann
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Dispersion
None
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Transparency
Opaque
Gemmological Tables (2004) More from other references
Refractive Index
1.500-1.670
1.635-1.663
Optic Character
Not Available
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Crystal System
Trigonal
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Birefringence
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0.0170-0.230
Clarity
Gemstones of the world (2001)
Gemmological Tables (2004) More from other references
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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Lapis lazuli Vs Nuummite Fracture
Fracture is an important parameter when you compare Lapis lazuli and Nuummite Physical Properties. It is necessary to understand the significance of these properties, before you compare Lapis lazuli Vs Nuummite 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 Lapis lazuli is ConchoidalWalter Schumann, Gemstones of the world (2001) and Uneven-Conchoidal. Nuummite fracture is Conchoidal.
Lapis lazuli Vs Nuummite Luster
A primary knowledge about Lapis lazuli vs Nuummite 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. Lapis lazuli exhibits Greasy and Vitreous luster.