Black Opal Vs Calcite
Color
White, Colorless, Blue, Red, Green, Yellow, Violet
White, Colorless, White, pink, Yellow, Brown
Streak
Not Available
White
For which Rashi?
Not Available
Cancer
Element of Planets
Not Available
Earth, Sun
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Energy
Not Available
Receptive
Deities
Not Available
Not Available
Not to wear with
Not Available
Not Available
Powers
Not Available
Spirituality, Healing
Planetary
Not Available
Not Available
Talisman
Not Available
Not Available
Tenacity
Not Available
Brittle
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
1.97-2.22
2.67-2.73
Fracture
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal
Cleavage
Not Available
Perfect on [10 1 1] three directions with angle of 74° 55
Chemical Composition
SiO 2 + H 2OUlrich Henn and Claudio C.
CaCO 3Ulrich Henn and Claudio C.
Luster
Not Available
Vitreous, Pearly
Pleochroism
AbsentWalter Schumann
NilArthur Thomas
Dispersion
None
Not Available
Transparency
Transparent, Translucent
Transparent, Translucent
Refractive Index
1.370-1.470
1.486-1.658
Optic Character
Not Available
Not Available
Crystal System
Not Available
Trigonal
Birefringence
Not Available
0.154-0.174
Clarity
Transparent
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
Black Opal Vs Calcite Fracture
Fracture is an important parameter when you compare Black Opal and Calcite Physical Properties. It is necessary to understand the significance of these properties, before you compare Black Opal Vs Calcite 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 Black Opal is ConchoidalArthur Thomas, ConchoidalArthur Thomas, Gemstones (2009) and Gemstones (2009). Calcite fracture is Brittle, Conchoidal, Conchoidal, ConchoidalArthur Thomas, ConchoidalArthur Thomas, Gemstones (2009) and Gemstones (2009).
Black Opal Vs Calcite Luster
A primary knowledge about Black Opal vs Calcite 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. Calcite, on other hand, exhibits Pearly and Vitreous luster.