Dravite and Mottramite Physical Properties
Tenacity
Not Available
  
Brittle
  
Solubility
Not Available
  
Soluble
  
Durability
Not Available
  
Not Available
  
Specific Gravity
3.03-3.18
  
5.9
  
Fracture
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
  
Sub-Conchoidal, Brittle, Metallic
  
Cleavage
{???} Indistinct
  
None observed
  
Mohs Hardness
7-7.5
  
3
  
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
  
Not Available
  
Dravite and Mottramite Chemical Formula
While comparing Dravite and Mottramite 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 Mottramite 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)
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Dravite and Mottramite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dravite and Mottramite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Mottramite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 5.9 whereas that of Mottramite is 5.9.