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Dravite and Grandidierite Physical Properties


Grandidierite and Dravite Physical Properties


Physical Properties

Tenacity
Not Available   
Not Available   

Solubility
Not Available   
Not Available   

Durability
Not Available   
Not Available   

Specific Gravity
3.03-3.18   
2.85-3.00   

Fracture
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle   
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven   

Cleavage
{???} Indistinct   
Perfect   

Mohs Hardness
7-7.5   
7.5   

Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)   
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.   

Optical Properties >>
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Dravite and Grandidierite Chemical Formula

While comparing Dravite and Grandidierite 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 Grandidierite chemical formula.

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Dravite and Grandidierite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Dravite and Grandidierite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Grandidierite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 2.85-3.00 whereas that of Grandidierite is 2.85-3.00.

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