Dravite and Humite Physical Properties
Tenacity
Not Available
Brittle
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
3.03-3.18
3.20-3.32
Fracture
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Uneven, Uneven, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal
Cleavage
{???} Indistinct
Poor
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)
(Mg,Fe2+ ) 7(SiO 4) 3(F,OH) 2Anthony et al , Handbook of mineralogy (2001)
Dravite and Humite Chemical Formula
While comparing Dravite and Humite 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 Humite 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 Humite- (Mg,Fe2+ ) 7(SiO 4) 3(F,OH) 2Anthony et al , Handbook of mineralogy (2001)
Dravite and Humite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dravite and Humite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Humite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 3.20-3.32 whereas that of Humite is 3.20-3.32.