Grandidierite Vs Cordierite Iolite
Origin
Madagascar
Canada, Madagascar, Southern and central Africa, Sri Lanka, USA
Streak
White
Not Available
For which Rashi?
Not Available
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Planet
Not Available
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Element of Planets
Not Available
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Finger
Not Available
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Ring Metal
Not Available
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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
Not Available
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Solubility
Not Available
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Durability
Not Available
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Specific Gravity
2.85-3.00
2.56-2.66
Fracture
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)
Cleavage
Perfect
Not Available
Chemical Composition
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Mg 2Al 4Si 5O 18Ulrich Henn and Claudio C.
Luster
Vitreous, Pearly
Vitreous
Pleochroism
visible
Strong trichroism: colorless to yellowish
Transparency
Gemmological Tables (2004) More from other references
Transparent
Refractive Index
1.578-1.639
1.542-1.578
Optic Character
Not Available
Biaxial/+
Crystal System
Orthorhombic
Not Available
Birefringence
0.037-0.039
0.008-0.012
Clarity
Gemmological Tables (2004) More from other references
Transparent
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 Iolite Fracture
Fracture is an important parameter when you compare Grandidierite and Cordierite Iolite Physical Properties. It is necessary to understand the significance of these properties, before you compare Grandidierite Vs Cordierite Iolite 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 Iolite fracture is ConchoidalWalter Schumann, Gemstones of the world (2001), Uneven and Uneven.
Grandidierite Vs Cordierite Iolite Luster
A primary knowledge about Grandidierite vs Cordierite Iolite 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 Iolite, on other hand, exhibits Vitreous luster.
