Lapis lazuli Vs Powellite
Color
Violet, Blue, White
Yellow, Greenish, Blue, Brown, Green, gray
For which Rashi?
Sagittarius
Not Available
Planet
Venus
Not Available
Element of Planets
Water
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
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Energy
Receptive
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Deities
Venus
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Not to wear with
Not Available
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Powers
Protection, Courage
Not Available
Planetary
Not Available
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Talisman
Not Available
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Tenacity
Not Available
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Solubility
Not Available
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Durability
Not Available
Not Available
Specific Gravity
2.50-3.00
4.23
Fracture
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
UnevenAnthony et al, Handbook of mineralogy (2001), UnevenAnthony et al, Handbook of mineralogy (2001), Brittle, Conchoidal
Cleavage
3,6
{111} Distinct
Chemical Composition
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
CaMoO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Luster
Vitreous, Greasy
Greasy, Subadamantine
Pleochroism
AbsentWalter Schumann
In deeply colored specimens: blue greenAnthony et al
Dispersion
None
Not Available
Transparency
Opaque
Transparent
Refractive Index
1.500-1.670
1.974-1.984
Optic Character
Not Available
Not Available
Crystal System
Trigonal
Not Available
Birefringence
Not Available
Not Available
Clarity
Gemstones of the world (2001)
Transparent
Neurological
Not Available
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Cardiovascular
Not Available
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Respiratory
Not Available
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Reproductive
Not Available
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Digestive
Not Available
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Psychology
Not Available
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Healing
Not Available
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Qualities Associated
Not Available
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Lapis lazuli Vs Powellite Fracture
Fracture is an important parameter when you compare Lapis lazuli and Powellite Physical Properties. It is necessary to understand the significance of these properties, before you compare Lapis lazuli Vs Powellite 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. Powellite fracture is Brittle, Conchoidal, Handbook of mineralogy (2001), Handbook of mineralogy (2001), UnevenAnthony et al and UnevenAnthony et al.
Lapis lazuli Vs Powellite Luster
A primary knowledge about Lapis lazuli vs Powellite 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. Powellite, on other hand, exhibits Greasy and Subadamantine luster.