Forsterite Vs Gahnite
Origin
Southern and central Africa
Australia
Color
Colorless, Green, Yellow, White, Colorless, Green, Yellow, White
Blue, Green, Greenish, Black
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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Solubility
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Durability
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Specific Gravity
3.23-3.26
4.00-4.62
Fracture
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Conchoidal, Uneven
Cleavage
Perfect on {010} imperfect on {100}
Indistinct parting on [111]
Mohs Hardness
6.5-7
7.5-8
Chemical Composition
Mg 2SiO 4Michael OâDonoghue , Gems, Sixth Edition (2006)
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Pleochroism
colorless.
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Dispersion
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Transparency
Transparent
Gemmological Tables (2004) More from other references
Refractive Index
1.635-1.671
1.790-1.818
Optic Character
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Crystal System
Orthorhombic
cubic
Birefringence
0.033-0.042
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Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
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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Forsterite Vs Gahnite Fracture
Fracture is an important parameter when you compare Forsterite and Gahnite Physical Properties. It is necessary to understand the significance of these properties, before you compare Forsterite Vs Gahnite 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 Forsterite is Brittle, Conchoidal, Conchoidal, ConchoidalAnthony et al and Handbook of mineralogy (2001). Gahnite fracture is Conchoidal and Uneven.
Forsterite Vs Gahnite Luster
A primary knowledge about Forsterite vs Gahnite 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. Forsterite exhibits Vitreous luster. Gahnite, on other hand, exhibits Vitreous luster.