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Jacobsite
Jacobsite

Ettringite
Ettringite



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Jacobsite
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Ettringite

Jacobsite 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
4.76-5.031.77
Amber
1 7.18
1.5 Fracture
Conchoidal, Brittle
Not Available
1.6 Cleavage
None
Perfect on {10 1 0}
1.7 Mohs Hardness
5.5-6.52-2.5
Amber
2 10
1.8 Chemical Composition
(Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)

Jacobsite and Ettringite Chemical Formula

While comparing Jacobsite 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 Jacobsite and Ettringite chemical formula.

  • Chemical formula of Jacobsite- (Mn2+ ,Fe2+ ,Mg)(Fe3+ ,Mn3+ ) 2O 4Anthony et al , Handbook of mineralogy (2001)
  • Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)

Jacobsite and Ettringite Specific Gravity

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