Grandidierite and Erythrite Physical Properties
Tenacity
Not Available
Sectile
Solubility
Not Available
Not Available
Durability
Not Available
Not Available
Specific Gravity
2.85-3.00
3.06
Fracture
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Cleavage
Perfect
Perfect on {010}; poor on {100} and { 1 02}.
Mohs Hardness
7.5
Not Available
Chemical Composition
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Co3(AsO4)2•8(H2O)
Grandidierite and Erythrite Chemical Formula
While comparing Grandidierite and Erythrite 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 Grandidierite and Erythrite chemical formula.
- Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
- Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
Grandidierite and Erythrite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Grandidierite and Erythrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Grandidierite and Erythrite Optical Properties during the identification of gemstone. Specific gravity of Grandidierite is 3.06 whereas that of Erythrite is 3.06.