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Ettringite
Ettringite

Fayalite
Fayalite



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Ettringite
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Ettringite and Fayalite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Partially soluble in water
Not Available
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
1.77
4.392
1.5 Fracture
Not Available
Conchoidal, ConchoidalAnthony et al, Handbook of mineralogy (2001), Conchoidal, Brittle
1.6 Cleavage
Perfect on {10 1 0}
{010} moderate, {100} imperfect
1.7 Mohs Hardness
2-2.5
6.5-7
1.8 Chemical Composition
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)
Fe 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Ettringite and Fayalite Chemical Formula

While comparing Ettringite and Fayalite 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 Ettringite and Fayalite chemical formula.

  • Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)
  • Chemical formula of Fayalite- Fe 2SiO 4Michael O’Donoghue , Gems, Sixth Edition (2006)

Ettringite and Fayalite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Fayalite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Fayalite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 4.392 whereas that of Fayalite is 4.392.