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