Zoisite and Ettringite Physical Properties
Tenacity
Not Available
Not Available
Solubility
Not Available
Partially soluble in water
Durability
Not Available
Not Available
Specific Gravity
3.20-3.50
1.77
Fracture
Uneven, Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), Even
Not Available
Cleavage
Perfect {010} imperfect {100}
Perfect on {10 1 0}
Chemical Composition
Ca2Al3(SiO4)3(OH)
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Zoisite and Ettringite Chemical Formula
While comparing Zoisite 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 Zoisite and Ettringite chemical formula.
- Chemical formula of Zoisite- Ca2Al3(SiO4)3(OH)
- Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Zoisite and Ettringite Specific Gravity
Another important criteria for qualitative analysis of gemstones is Zoisite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Zoisite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Zoisite is 1.77 whereas that of Ettringite is 1.77.