Dravite and Childrenite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Soluble
Durability
Not Available
Not Available
Specific Gravity
3.03-3.18
3.06-3.25
Fracture
Uneven, Uneven, Irregular, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
Sub-Conchoidal, ConchoidalArthur Thomas, Conchoidal, Uneven
Cleavage
{???} Indistinct
Poor/indistinct on {100}
Mohs Hardness
7-7.5
4.5-5
Chemical Composition
Na(Mg 3)Al 6(Si 6O 18)(BO 3) 3(OH) 3(OH)Gemdat.org , Management Team (2012)
(Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
Dravite and Childrenite Chemical Formula
While comparing Dravite and Childrenite 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 Childrenite 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 Childrenite- (Fe,Mn)AlPO 4(OH) 2 -H 2OArthur Thomas , Gemstones (2009)
Dravite and Childrenite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Dravite and Childrenite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Dravite and Childrenite Optical Properties during the identification of gemstone. Specific gravity of Dravite is 3.06-3.25 whereas that of Childrenite is 3.06-3.25.