Grandidierite and Ettringite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Partially soluble in water
Durability
Not Available
Not Available
Specific Gravity
2.85-3.00
1.77
Fracture
Brittle, UnevenArthur Thomas, Gemstones (2009), Brittle, Uneven
Not Available
Cleavage
Perfect
Perfect on {10 1 0}
Chemical Composition
(Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Grandidierite and Ettringite Chemical Formula
While comparing Grandidierite and Ettringite 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 Ettringite chemical formula.
- Chemical formula of Grandidierite- (Mg,Fe)Al 3(BO 4)(SiO 4)OUlrich Henn and Claudio C.
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Grandidierite and Ettringite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Grandidierite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Grandidierite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Grandidierite is 1.77 whereas that of Ettringite is 1.77.