Gedrite Vs Gahnite
Origin
Southern and central Africa
Australia
Color
Brown, Green, gray, White
Blue, Green, Greenish, Black
Streak
gray, White
Grey, gray
Specific Gravity
3.15-3.259
4.00-4.62
Fracture
-
Conchoidal, Uneven
Cleavage
Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.
Indistinct parting on [111]
Mohs Hardness
5.5-6
7.5-8
Chemical Composition
(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
ZnAl 2O 4Michael OâDonoghue , Gems, Sixth Edition (2006)
Pleochroism
Weak to moderate
-
Transparency
Transparent
-
Refractive Index
1.625-1.718
1.790-1.818
Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
cubic
Birefringence
-9999
-9999
Clarity
Transparent
TransparentUlrich Henn and Claudio C. Milisenda
Neurological
-
Enhances mental clarity and focus
Respiratory
-
Aids in digestion and soothes the stomach
Psychology
Focus
Protection
Healing
-
Emotional healing
Qualities Associated
Protection
Harmony
Gedrite Vs Gahnite Fracture
Fracture is an important parameter when you compare Gedrite and Gahnite Physical Properties. It is necessary to understand the significance of these properties, before you compare Gedrite Vs Gahnite 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. Gahnite fracture is Conchoidal and Uneven.
Gedrite Vs Gahnite Luster
A primary knowledge about Gedrite vs Gahnite 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. Gahnite, on other hand, exhibits Vitreous luster.