Grossular Vs Precious Opal
Origin
Sri Lanka, India, Brazil
Australia
Color
Green, Brown, Brown, Colorless, Green, gray, Yellow
Yellow, Green, Blue
Streak
Brownish, White, Brownish, White
Not Available
For which Rashi?
Not Available
Not Available
Planet
Not Available
Not Available
Element of Planets
Not Available
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Energy
Not Available
Not Available
Deities
Not Available
Not Available
Not to wear with
Not Available
Not Available
Powers
Not Available
Not Available
Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.55-3.73
1.98-2.25
Fracture
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references
Cleavage
none
Not Available
Mohs Hardness
7-7.5
5-6.5
Chemical Composition
Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
SiO 2 · nH 2OGemdat.org , Management Team (2012)
Luster
Greasy, Vitreous
Not Available
Pleochroism
None
AbsentWalter Schumann
Transparency
Gemmological Tables (2004) More from other references
Transparent, Translucent
Refractive Index
1.730-1.760
1.370-1.470
Optic Character
Not Available
Not Available
Crystal System
cubic
Not Available
Birefringence
0.020
Not Available
Clarity
TransparentUlrich Henn and Claudio C. Milisenda
Transparent
Neurological
Not Available
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Cardiovascular
Not Available
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Respiratory
Not Available
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Reproductive
Not Available
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Digestive
Not Available
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Psychology
Not Available
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Healing
Not Available
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Qualities Associated
Not Available
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Grossular Vs Precious Opal Fracture
Fracture is an important parameter when you compare Grossular and Precious Opal Physical Properties. It is necessary to understand the significance of these properties, before you compare Grossular Vs Precious 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. Fracture observed in Grossular is Brittle, Conchoidal, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009) and Uneven. Precious Opal fracture is Conchoidal, Conchoidal and Gemstones of the world (2001) More from other references.
Grossular Vs Precious Opal Luster
A primary knowledge about Grossular vs Precious 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. Grossular exhibits Greasy and Vitreous luster.