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Gahnospinel
Gahnospinel

Ettringite
Ettringite



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Gahnospinel
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Ettringite

Gahnospinel and Ettringite Physical Properties

1 Physical Properties
1.1 Tenacity
Not Available
Not Available
1.2 Solubility
Not Available
Partially soluble in water
1.3 Durability
Not Available
Not Available
1.4 Specific Gravity
3.65-4.55
1.77
1.5 Fracture
ConchoidalArthur Thomas, Gemstones (2009)
Not Available
1.6 Cleavage
None, but may exhibit slight parting
Perfect on {10 1 0}
1.7 Mohs Hardness
7.5-8
2-2.5
1.8 Chemical Composition
(Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)

Gahnospinel and Ettringite Chemical Formula

While comparing Gahnospinel 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 Gahnospinel and Ettringite chemical formula.

  • Chemical formula of Gahnospinel- (Mg,Zn)Al 2O 4Gemdat.org , Management Team (2012)
  • Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)

Gahnospinel and Ettringite Specific Gravity

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