Dravite and Hollandite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.03-3.18
5.05
Fracture
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Brittle, Metallic
Cleavage
{???} Indistinct
Distinct / Good, Prismatic
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Ba(Mn++++,Mn++)8O16
Dravite and Hollandite Chemical Formula
While comparing Dravite and Hollandite 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 Hollandite 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 Hollandite- Ba(Mn++++,Mn++)8O16
Dravite and Hollandite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dravite and Hollandite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Hollandite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 5.05 whereas that of Hollandite is 5.05.