Dravite and Goethite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
HCl soluble
Durability
Not Available
Not Available
Specific Gravity
3.03-3.18
4.27-4.29
Fracture
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Uneven, torn surfaces, (e.g. fractured metals)., Uneven, Gemstones (2009), torn surfaces, (e.g. fractured metals).
Cleavage
{???} Indistinct
Perfect {010}
Mohs Hardness
7-7.5
5-5.5
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
FeO(OH)Arthur Thomas , Gemstones (2009)
Dravite and Goethite Chemical Formula
While comparing Dravite and Goethite 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 Goethite 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 Goethite- FeO(OH)Arthur Thomas , Gemstones (2009)
Dravite and Goethite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dravite and Goethite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Goethite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 4.27-4.29 whereas that of Goethite is 4.27-4.29.