Grandidierite Vs Cordierite
Origin
Madagascar
Australia, Brazil, Burma, Canada, India, Madagascar, Sri Lanka, Tanzania
Color
Green
Blue, Violet, Greenish, Brown, Colorless, Colorless, Blue, Violet, Yellow, 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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Tenacity
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Brittle
Solubility
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Durability
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Specific Gravity
2.85-3.00
2.57-2.66
Fracture
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
Subconchoidal, Conchoidal, Brittle
Cleavage
Perfect
Fair on {100}, poor on {001} and {010}
Chemical Composition
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Mg2Al4Si5O18
Luster
Vitreous, Pearly
Greasy, Vitreous
Pleochroism
visible
X = pale yellow
Dispersion
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Transparency
Gemmological Tables (2004) More from other references
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Refractive Index
1.578-1.639
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Optic Character
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Crystal System
Orthorhombic
Orthorhombic
Birefringence
0.037-0.039
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Clarity
Gemmological Tables (2004) More from other references
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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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Grandidierite Vs Cordierite Fracture
Fracture is an important parameter when you compare Grandidierite and Cordierite Physical Properties. It is necessary to understand the significance of these properties, before you compare Grandidierite Vs Cordierite 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 Grandidierite is Brittle, Brittle, Gemstones (2009), Uneven and UnevenArthur Thomas. Cordierite fracture is Brittle, Conchoidal and Subconchoidal.
Grandidierite Vs Cordierite Luster
A primary knowledge about Grandidierite vs Cordierite 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. Grandidierite exhibits Pearly and Vitreous luster. Cordierite, on other hand, exhibits Greasy and Vitreous luster.