Holmquistite Vs Black Opal
Origin
Southern and central Africa
Australia
Color
Black, Blue, Violet
White, Colorless, Blue, Red, Green, Yellow, Violet
Streak
White
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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
Not Available
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Durability
Not Available
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Specific Gravity
2.95-3.13
1.97-2.22
Fracture
Not Available
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
{210} Perfect
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Chemical Composition
Li 2[(Mg,Fe2+ ) 3Al 2]Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
SiO 2 + H 2OUlrich Henn and Claudio C.
Luster
Vitreous
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Pleochroism
Strong in shades of violet when dark-colored.Anthony et al
AbsentWalter Schumann
Dispersion
Not Available
None
Transparency
Transparent
Transparent, Translucent
Refractive Index
1.622-1.666
1.370-1.470
Optic Character
Not Available
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Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
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Birefringence
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Clarity
Transparent
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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Holmquistite Vs Black Opal Fracture
Fracture is an important parameter when you compare Holmquistite and Black Opal Physical Properties. It is necessary to understand the significance of these properties, before you compare Holmquistite Vs Black Opal 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. Black Opal fracture is ConchoidalArthur Thomas, ConchoidalArthur Thomas, Gemstones (2009) and Gemstones (2009).
Holmquistite Vs Black Opal Luster
A primary knowledge about Holmquistite vs Black Opal 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. Holmquistite exhibits Vitreous luster.