Origin
Southern and central Africa
Sri Lanka
Color
Brown, Green, gray, White
Black, Brownish, Reddish, Brown, Red, Yellow, White, Colorless, Green, gray
Streak
gray, White
White, Brownish
Specific Gravity
3.15-3.259
6.86-7.03
Fracture
-
Subconchoidal, Uneven, Conchoidal, Irregular
Cleavage
Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.
{100} imperfect, {110} indistinct; partings on {111} or {011}
Chemical Composition
(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Vitreous
Adamantine, Greasy
Pleochroism
Weak to moderate
Pleochroic haloes have been observed. Dichroic in yellow
Transparency
Transparent
Transparent, Translucent
Refractive Index
1.625-1.718
1.990-2.105
Crystal System
Orthorhombic Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: P nma
tetragonal
Birefringence
-9999
0.096-0.098
Clarity
Transparent
Transparent
Neurological
-
Enhances mental clarity and focus
Cardiovascular
-
Supports heart health
Healing
-
Emotional healing
Qualities Associated
Protection
Manifestation
Gedrite Vs Cassiterite Fracture
Fracture is an important parameter when you compare Gedrite and Cassiterite Physical Properties. It is necessary to understand the significance of these properties, before you compare Gedrite Vs Cassiterite 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. Cassiterite fracture is Subconchoidal, Uneven, Conchoidal and Irregular.
Gedrite Vs Cassiterite Luster
A primary knowledge about Gedrite vs Cassiterite 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. Cassiterite, on other hand, exhibits Adamantine and Greasy luster.