Origin
Southern and central Africa
Brazil, USA, Madagascar, Sri Lanka, Burma, Thailand, Cambodia, Afghanistan, Russia
Color
Brown, Green, gray, White
Blue, Violet, Colorless, Red, Green, Brown
For which Rashi?
-
Sagittarius, Scorpio
Specific Gravity
3.15-3.259
3.64-3.66
Fracture
-
Conchoidal, Uneven
Cleavage
Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.
None, but may exhibit slight parting
Chemical Composition
(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
MgAl2O4
Pleochroism
Weak to moderate
Absent
Transparency
Transparent
Transparent, Translucent, Transparent to translucent
Refractive Index
1.625-1.718
1.73
Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Isometric
Birefringence
-9999
-9999
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
Psychology
Focus
Revitalization
Healing
-
Emotional healing
Qualities Associated
Protection
Vitality
Gedrite Vs Spinel Fracture
Fracture is an important parameter when you compare Gedrite and Spinel Physical Properties. It is necessary to understand the significance of these properties, before you compare Gedrite 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. Spinel fracture is Conchoidal and Uneven.
Gedrite Vs Spinel Luster
A primary knowledge about Gedrite 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. Gedrite exhibits Vitreous luster. Spinel, on other hand, exhibits Vitreous luster.