Bertrandite Vs Cassiterite
Origin
Southern and central Africa
Sri Lanka
Color
Colorless, Yellow
Black, Brownish, Reddish, Brown, Red, Yellow, White, Colorless, Green, gray
Streak
White
White, Brownish
Specific Gravity
2.59-2.60
6.86-7.03
Fracture
-
Subconchoidal, Uneven, Conchoidal, Irregular
Cleavage
{001} Perfect, {110} Distinct, {101} Distinct
{100} imperfect, {110} indistinct; partings on {111} or {011}
Chemical Composition
Be 4Si 2O 7(OH) 2Anthony et al , Handbook of mineralogy (2001)
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Luster
Vitreous
Adamantine, Greasy
Pleochroism
none.
Pleochroic haloes have been observed. Dichroic in yellow
Transparency
TransparentAnthony et al
Transparent, Translucent
Refractive Index
1.583-1.614
1.990-2.105
Crystal System
Orthorhombic Pyramidal H-M Symbol (mm2) Space Group: Ccm21
tetragonal
Birefringence
-9999
0.096-0.098
Clarity
TransparentAnthony et al
Transparent
Neurological
-
Enhances mental clarity and focus
Cardiovascular
Promotes mental clarity
Supports heart health
Healing
Emotional healing
Emotional healing
Qualities Associated
Creativity
Manifestation
Bertrandite Vs Cassiterite Fracture
Fracture is an important parameter when you compare Bertrandite and Cassiterite Physical Properties. It is necessary to understand the significance of these properties, before you compare Bertrandite 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.
Bertrandite Vs Cassiterite Luster
A primary knowledge about Bertrandite 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. Bertrandite exhibits Vitreous luster. Cassiterite, on other hand, exhibits Adamantine and Greasy luster.