Gedrite Vs Vivianite
Origin
Southern and central Africa
Southern and central Africa
Color
Brown, Green, gray, White
Blue, Green, Colorless
Specific Gravity
3.15-3.259
2.64-2.70
Cleavage
Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.
{010} Perfect
Mohs Hardness
5.5-6
-9999
Chemical Composition
(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.
Luster
Vitreous
Vitreous, Pearly
Pleochroism
Weak to moderate
Anomalous plechroism is strong with colours deep blue/pale yellowish green/yellowish green.Michael OâDonoghue
Transparency
Transparent
Transparent
Refractive Index
1.625-1.718
1.560-1.640
Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
-
Birefringence
-9999
0.054-0.075
Clarity
Transparent
Transparent
Neurological
-
Enhances mental clarity and focus
Healing
-
Emotional healing
Qualities Associated
Protection
Transformation
Gedrite Vs Vivianite Fracture
Fracture is an important parameter when you compare Gedrite and Vivianite Physical Properties. It is necessary to understand the significance of these properties, before you compare Gedrite Vs Vivianite 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.
Gedrite Vs Vivianite Luster
A primary knowledge about Gedrite vs Vivianite 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. Vivianite, on other hand, exhibits Vitreous and Pearly luster.