Dravite and Prehnite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.03-3.18
2.80-2.95
Fracture
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Uneven, Yellow, White, UnevenWalter Schumann, Gemstones of the world (2001) More from other references, Brittle, Metallic
Cleavage
{???} Indistinct
Distinct on [001]
Mohs Hardness
7-7.5
6-6.5
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Ca2Al2Si3O12(OH)
Dravite and Prehnite Chemical Formula
While comparing Dravite and Prehnite 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 Prehnite 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 Prehnite- Ca2Al2Si3O12(OH)
Dravite and Prehnite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dravite and Prehnite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Prehnite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 2.80-2.95 whereas that of Prehnite is 2.80-2.95.