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Ettringite
Ettringite

Pumpellyite
Pumpellyite



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Ettringite
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Pumpellyite

Ettringite and Pumpellyite 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
1.773.20-3.30
Amber
1 7.18
1.5 Fracture
Not Available
Not Available
1.6 Cleavage
Perfect on {10 1 0}
Not Available
1.7 Mohs Hardness
2-2.55-6
Amber
2 10
1.8 Chemical Composition
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)
Ca 2(Mg,Fe,Mn,Al) 2(SiO 4)(Si 2O 7)(OH) 2 · H 2OUlrich Henn and Claudio C.

Ettringite and Pumpellyite Chemical Formula

While comparing Ettringite and Pumpellyite 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 Pumpellyite 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 Pumpellyite- Ca 2(Mg,Fe,Mn,Al) 2(SiO 4)(Si 2O 7)(OH) 2 · H 2OUlrich Henn and Claudio C.

Ettringite and Pumpellyite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Pumpellyite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Pumpellyite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 3.20-3.30 whereas that of Pumpellyite is 3.20-3.30.