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