Lapis lazuli Vs Grandidierite
Origin
Afghanistan
Madagascar
Color
Violet, Blue, White
Green
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
Not Available
Deities
Venus
Not Available
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
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.50-3.00
2.85-3.00
Fracture
Uneven-Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
Chemical Composition
The chief constituent Lapis Lazuli is Lazurite, with the following chemical formula: (Na,Ca)8Al6Si6O24(S,SO)4
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Luster
Vitreous, Greasy
Vitreous, Pearly
Pleochroism
AbsentWalter Schumann
visible
Dispersion
None
Not Available
Transparency
Opaque
Gemmological Tables (2004) More from other references
Refractive Index
1.500-1.670
1.578-1.639
Optic Character
Not Available
Not Available
Crystal System
Trigonal
Orthorhombic
Birefringence
Not Available
0.037-0.039
Clarity
Gemstones of the world (2001)
Gemmological Tables (2004) More from other references
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 Grandidierite Fracture
Fracture is an important parameter when you compare Lapis lazuli and Grandidierite Physical Properties. It is necessary to understand the significance of these properties, before you compare Lapis lazuli Vs Grandidierite 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. Grandidierite fracture is Brittle, Brittle, Gemstones (2009), Uneven and UnevenArthur Thomas.
Lapis lazuli Vs Grandidierite Luster
A primary knowledge about Lapis lazuli vs Grandidierite 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. Grandidierite, on other hand, exhibits Pearly and Vitreous luster.