Gedrite Vs Bertrandite
Origin
Southern and central Africa
Southern and central Africa
Color
Brown, Green, gray, White
Colorless, Yellow
Specific Gravity
3.15-3.259
2.59-2.60
Cleavage
Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.
{001} Perfect, {110} Distinct, {101} Distinct
Chemical Composition
(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
Pleochroism
Weak to moderate
none.
Transparency
Transparent
TransparentAnthony et al
Refractive Index
1.625-1.718
1.583-1.614
Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21
Birefringence
-9999
-9999
Clarity
Transparent
TransparentAnthony et al
Cardiovascular
-
Promotes mental clarity
Healing
-
Emotional healing
Qualities Associated
Protection
Creativity
Gedrite Vs Bertrandite Fracture
Fracture is an important parameter when you compare Gedrite and Bertrandite Physical Properties. It is necessary to understand the significance of these properties, before you compare Gedrite Vs Bertrandite 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 Bertrandite Luster
A primary knowledge about Gedrite vs Bertrandite 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. Bertrandite, on other hand, exhibits Vitreous luster.