Dravite and Diaspore Physical Properties
Tenacity
Not Available
Very brittle
Solubility
Not Available
insoluble
Durability
Not Available
Not Available
Specific Gravity
3.03-3.18
3.30-3.40
Fracture
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Conchoidal, Brittle, Conchoidal
Cleavage
{???} Indistinct
{010} perfect, {110} distinct, {100} in traces
Mohs Hardness
7-7.5
6.5-7
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Dravite and Diaspore Chemical Formula
While comparing Dravite and Diaspore physical properties, the important data you should know is its chemical composition. Since chemical formula defines the molecular structure of the crystal, most of the physical properties like color, tenacity, solubility are governed by Dravite and Diaspore chemical formula.
- Chemical formula of Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
- Chemical formula of Diaspore- AlO(OH)Walter Schumann , Gemstones of the world (2001) More from other references
Dravite and Diaspore Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dravite and Diaspore Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Diaspore Optical Properties during the identification of gemstone. Specific gravity of Dravite is 3.30-3.40 whereas that of Diaspore is 3.30-3.40.