Gedrite Vs Blue John
Origin
Southern and central Africa
-
Color
Brown, Green, gray, White
White, Colorless, Blue, Red, Green, Yellow, Violet
Specific Gravity
3.15-3.259
3.00-3.25
Cleavage
Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.
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)
CaF 2Michael OâDonoghue , Gems, Sixth Edition (2006)
Pleochroism
Weak to moderate
-
Transparency
Transparent
Transparent
Refractive Index
1.625-1.718
1.432-1.436
Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
-
Birefringence
-9999
-9999
Clarity
Transparent
Transparent
Neurological
-
Enhances mental clarity and focus
Cardiovascular
-
Supports heart health
Healing
-
Emotional healing
Qualities Associated
Protection
Mental Clarity
Gedrite Vs Blue John Fracture
Fracture is an important parameter when you compare Gedrite and Blue John Physical Properties. It is necessary to understand the significance of these properties, before you compare Gedrite Vs Blue John 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 Blue John Luster
A primary knowledge about Gedrite vs Blue John 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.