Nephrite and Dravite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.90-3.10
3.03-3.18
Fracture
Splintery, Granular, Splintery, Granular, Gemstones (2009)
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Cleavage
Not Available
{???} Indistinct
Mohs Hardness
6-6.5
7-7.5
Chemical Composition
Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Nephrite and Dravite Chemical Formula
While comparing Nephrite and Dravite 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 Nephrite and Dravite chemical formula.
- Chemical formula of Nephrite- Ca 2(Mg,Fe) 5(OH) 2Walter Schumann , Gemstones of the world (2001) More from other references
- Chemical formula of Dravite- Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Nephrite and Dravite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Nephrite and Dravite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Nephrite and Dravite Optical Properties during the identification of gemstone. Specific gravity of Nephrite is 3.03-3.18 whereas that of Dravite is 3.03-3.18.