Mellite Vs Grandidierite
Origin
Southern and central Africa
Madagascar
Color
Brown, Brownish, White, Colorless, Yellow
Green
For which Rashi?
Not Available
Not Available
Planet
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Element of Planets
Not Available
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Finger
Not Available
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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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Solubility
Not Available
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Durability
Not Available
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Specific Gravity
1.58-1.60
2.85-3.00
Fracture
ConchoidalAnthony et al, Handbook of mineralogy (2001), ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
Cleavage
{011} Imperfect
Perfect
Chemical Composition
Al 2(Cl 2O 12) · 18H 2OUlrich Henn and Claudio C.
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Luster
Vitreous
Vitreous, Pearly
Pleochroism
Weak: yellowish brown yellowAnthony et al
visible
Dispersion
Not Available
Not Available
Transparency
Gemmological Tables (2004) More from other references
Gemmological Tables (2004) More from other references
Refractive Index
1.509-1.541
1.578-1.639
Optic Character
Not Available
Not Available
Crystal System
Not Available
Orthorhombic
Birefringence
0.030
0.037-0.039
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
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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Mellite Vs Grandidierite Fracture
Fracture is an important parameter when you compare Mellite and Grandidierite Physical Properties. It is necessary to understand the significance of these properties, before you compare Mellite 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 Mellite is Brittle, Conchoidal, ConchoidalAnthony et al, ConchoidalAnthony et al, Handbook of mineralogy (2001) and Handbook of mineralogy (2001). Grandidierite fracture is Brittle, Brittle, Gemstones (2009), Uneven and UnevenArthur Thomas.
Mellite Vs Grandidierite Luster
A primary knowledge about Mellite 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. Mellite exhibits Vitreous luster. Grandidierite, on other hand, exhibits Pearly and Vitreous luster.