Origin
Ethiopia
Sri Lanka, India, Brazil
Color
Yellow, White, Red, Brown, Blue
Green, Brown, Brown, Colorless, Green, gray, Yellow
Streak
White
Brownish, White, Brownish, White
For which Rashi?
Cancer, Libra, Scorpio, Cancer, Libra, Scorpio, Cancer, Libra, Scorpio
Not Available
Planet
Mercury
Not Available
Element of Planets
Earth, Air, Water
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Energy
Projective, Receptive
Not Available
Deities
Cupid
Not Available
Not to wear with
Not Available
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Powers
Astral Projection, Psychicism
Not Available
Planetary
Not Available
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Talisman
Not Available
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Tenacity
BrittleWalter Schumann
Not Available
Solubility
hot salt water
Not Available
Durability
Not Available
Not Available
Specific Gravity
1.98-2.25
3.55-3.73
Fracture
Conchoidal, Conchoidal, Gemstones of the world (2001) More from other references, Brittle
Conchoidal, Uneven, ConchoidalArthur Thomas, Gemstones (2009), Conchoidal, Brittle
Mohs Hardness
5-6.5
7-7.5
Chemical Composition
SiO2 · nH2O
Ca 3Al 2(SiO 4) 3Arthur Thomas , Gemstones (2009)
Luster
Vitreous, Pearly
Greasy, Vitreous
Transparency
Transparent, Translucent, Transparent to translucent
Gemmological Tables (2004) More from other references
Refractive Index
1.37-1.52
1.730-1.760
Optic Character
Not Available
Not Available
Crystal System
Trigonal
cubic
Birefringence
Not Available
0.020
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
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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Opal Vs Grossular Fracture
Fracture is an important parameter when you compare Opal and Grossular Physical Properties. It is necessary to understand the significance of these properties, before you compare Opal Vs Grossular 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 Opal is Brittle, Conchoidal, Conchoidal and Gemstones of the world (2001) More from other references. Grossular fracture is Brittle, Conchoidal, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009) and Uneven.
Opal Vs Grossular Luster
A primary knowledge about Opal vs Grossular 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. Opal exhibits Pearly and Vitreous luster. Grossular, on other hand, exhibits Greasy and Vitreous luster.