Foitite Vs Gedrite
Origin
Southern and central Africa
Southern and central Africa
Color
Violet, Black
Brown, Green, gray, White
Streak
gray, White
gray, White
Specific Gravity
3.17
3.15-3.259
Cleavage
None
Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.
Chemical Composition
Na x[Fe2+2(Al,Fe3+ )]Al 6(BO 3) 3Si 6O 18(OH) 4Anthony 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
Strong: pale lavender dark blueAnthony et al
Weak to moderate
Transparency
TranslucentAnthony et al, Translucent
Transparent
Refractive Index
-9999
1.625-1.718
Crystal System
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
Birefringence
-9999
-9999
Clarity
TranslucentAnthony et al
Transparent
Psychology
Empowerment
Focus
Healing
Emotional healing
-
Qualities Associated
Emotional Healing
Protection
Foitite Vs Gedrite Fracture
Fracture is an important parameter when you compare Foitite and Gedrite Physical Properties. It is necessary to understand the significance of these properties, before you compare Foitite 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.
Foitite Vs Gedrite Luster
A primary knowledge about Foitite 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. Foitite exhibits Vitreous luster. Gedrite, on other hand, exhibits Vitreous luster.