Dravite and Phosphophyllite Physical Properties
Specific Gravity
3.03-3.18
3.07-3.13
Fracture
Uneven, Irregular, Conchoidal
Conchoidal, Uneven
Cleavage
{???} Indistinct
{100} Perfect, {010} Distinct, {102} Distinct
Mohs Hardness
7-7.5
3-3.5
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Dravite and Phosphophyllite Chemical Formula
While comparing Dravite and Phosphophyllite 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 Phosphophyllite 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 Phosphophyllite- Zn 2(Fe2+ ,Mn2+ )(PO 4) 2 · 4H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Dravite and Phosphophyllite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dravite and Phosphophyllite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Phosphophyllite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 3.07-3.13 whereas that of Phosphophyllite is 3.07-3.13.