Grandidierite Vs Spinel
Origin
Madagascar
Brazil, USA, Madagascar, Sri Lanka, Burma, Thailand, Cambodia, Afghanistan, Russia
Color
Green
Blue, Violet, Colorless, Red, Green, Brown
For which Rashi?
Not Available
Sagittarius, Scorpio
Planet
Not Available
Pluto
Element of Planets
Not Available
Not Available
Energy
Not Available
Not Available
Finger
Not Available
Not Available
Ring Metal
Not Available
Not Available
Deities
Not Available
Hephaestus
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
3.64-3.66
Fracture
Uneven
Conchoidal, Uneven
Cleavage
Perfect
None, but may exhibit slight parting
Chemical Composition
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
MgAl2O4
Luster
Vitreous, Pearly
Vitreous
Pleochroism
visible
Absent
Transparency
Not Available
Transparent, Translucent, Transparent to translucent
Refractive Index
1.578-1.639
1.73
Optic Character
Not Available
Not Available
Crystal System
Orthorhombic
Isometric
Birefringence
0.037-0.039
Not Available
Clarity
Not Available
TransparentUlrich Henn and Claudio C. Milisenda
Neurological
Not Available
Not Available
Cardiovascular
Not Available
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Respiratory
Not Available
Not Available
Reproductive
Not Available
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Digestive
Not Available
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Psychology
Not Available
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Healing
Not Available
Not Available
Qualities Associated
Not Available
Not Available
Grandidierite Vs Spinel Fracture
Fracture is an important parameter when you compare Grandidierite and Spinel Physical Properties. It is necessary to understand the significance of these properties, before you compare Grandidierite Vs Spinel 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 Uneven. Spinel fracture is Conchoidal and Uneven.
Grandidierite Vs Spinel Luster
A primary knowledge about Grandidierite vs Spinel 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 Vitreous and Pearly luster. Spinel, on other hand, exhibits Vitreous luster.
