Origin
Sri Lanka
Southern and central Africa
Color
Black, Brownish, Reddish, Brown, Red, Yellow, White, Colorless, Green, gray
White, Colorless, Blue, Red, Green, Yellow, Violet, Black
Streak
White, Brownish
Colorless
Specific Gravity
6.86-7.03
3.03-3.18
Fracture
Subconchoidal, Uneven, Conchoidal, Irregular
Uneven, Irregular, Conchoidal
Cleavage
{100} imperfect, {110} indistinct; partings on {111} or {011}
{???} Indistinct
Chemical Composition
SnO 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Luster
Adamantine, Greasy
Vitreous
Pleochroism
Pleochroic haloes have been observed. Dichroic in yellow
Very strong: pale yellow colorless
Transparency
Transparent, Translucent
Transparent
Refractive Index
1.990-2.105
1.614-1.666
Crystal System
tetragonal
Trigonal Ditrigonal Pyramidal H-M Symbol (3m) Space Group: R 3m
Birefringence
0.096-0.098
0.014-0.032
Clarity
Transparent
Transparent
Neurological
Enhances mental clarity and focus
-
Cardiovascular
Supports heart health
-
Psychology
Focus
Self-acceptance
Healing
Emotional healing
Emotional healing
Qualities Associated
Manifestation
Self-Exploration
Cassiterite Vs Dravite Fracture
Fracture is an important parameter when you compare Cassiterite and Dravite Physical Properties. It is necessary to understand the significance of these properties, before you compare Cassiterite Vs Dravite 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. Fracture observed in Cassiterite is Subconchoidal, Uneven, Conchoidal and Irregular. Dravite fracture is Uneven, Irregular and Conchoidal.
Cassiterite Vs Dravite Luster
A primary knowledge about Cassiterite vs Dravite 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. Cassiterite exhibits Adamantine and Greasy luster. Dravite, on other hand, exhibits Vitreous luster.