Dravite and Anthophyllite Physical Properties
Specific Gravity
3.03-3.18
2.9-3.5
Fracture
Uneven, Irregular, Conchoidal
Conchoidal
Cleavage
{???} Indistinct
{110} Perfect, {???} Distinct, {???} Distinct
Mohs Hardness
7-7.5
5.5-6
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
(Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Dravite and Anthophyllite Chemical Formula
While comparing Dravite and Anthophyllite 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 Anthophyllite 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 Anthophyllite- (Mg,Fe2+ ) 2(Mg,Fe2+ ) 5Si 8O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Dravite and Anthophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dravite and Anthophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Anthophyllite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 2.9-3.5 whereas that of Anthophyllite is 2.9-3.5.