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Erythrite
Erythrite

Ettringite
Ettringite



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Erythrite
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Ettringite

Erythrite and Ettringite Physical Properties

1 Physical Properties
1.1 Tenacity
Sectile
Not Available
1.2 Solubility
Not Available
Partially soluble in water
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.061.77
Amber
1 7.18
1.5 Fracture
Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).
Not Available
1.6 Cleavage
Perfect on {010}; poor on {100} and { 1 02}.
Perfect on {10 1 0}
1.7 Mohs Hardness
Not Available2-2.5
Amber
2 10
1.8 Chemical Composition
Co3(AsO4)2•8(H2O)
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)

Erythrite and Ettringite Chemical Formula

While comparing Erythrite 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 Erythrite and Ettringite chemical formula.

  • Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
  • Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)

Erythrite and Ettringite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Erythrite and Ettringite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Ettringite Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 1.77 whereas that of Ettringite is 1.77.