Ettringite and Andradite Garnet Physical Properties

Ettringite

Andradite Garnet

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Partially soluble in water

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

1.773.8-3.9

1 7.18

1.5 Fracture

Not Available

1.6 Cleavage

Perfect on {10 1 0}

None

1.7 Mohs Hardness

2-2.56.5-7.5

2 10

1.8 Chemical Composition

Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Ca₃Fe³⁺₂Si₃O₁₂

Ettringite and Andradite Garnet Chemical Formula

While comparing Ettringite and Andradite Garnet 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 Andradite Garnet chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Andradite Garnet- Ca₃Fe³⁺₂Si₃O₁₂

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Ettringite and Andradite Garnet Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Andradite Garnet Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Andradite Garnet Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 3.8-3.9 whereas that of Andradite Garnet is 3.8-3.9.