Grandidierite Vs Black Opal
Origin
Madagascar
Australia
Color
Green
White, Colorless, Blue, Red, Green, Yellow, Violet
Streak
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
2.85-3.00
1.97-2.22
Fracture
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009)
Cleavage
Perfect
Not Available
Chemical Composition
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
SiO 2 + H 2OUlrich Henn and Claudio C.
Luster
Vitreous, Pearly
Not Available
Pleochroism
visible
AbsentWalter Schumann
Dispersion
Not Available
None
Transparency
Gemmological Tables (2004) More from other references
Transparent, Translucent
Refractive Index
1.578-1.639
1.370-1.470
Optic Character
Not Available
Not Available
Crystal System
Orthorhombic
Not Available
Birefringence
0.037-0.039
Not Available
Clarity
Gemmological Tables (2004) More from other references
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
Grandidierite Vs Black Opal Fracture
Fracture is an important parameter when you compare Grandidierite and Black Opal Physical Properties. It is necessary to understand the significance of these properties, before you compare Grandidierite 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. Fracture observed in Grandidierite is Brittle, Brittle, Gemstones (2009), Uneven and UnevenArthur Thomas. Black Opal fracture is ConchoidalArthur Thomas, ConchoidalArthur Thomas, Gemstones (2009) and Gemstones (2009).
Grandidierite Vs Black Opal Luster
A primary knowledge about Grandidierite 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. Grandidierite exhibits Pearly and Vitreous luster.