Stolzite and Ettringite Physical Properties

Stolzite

Ettringite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

Partially soluble in water

1.3 Durability

Not Available

1.4 Specific Gravity

21.77

1 7.18

1.5 Fracture

Conchoidal, Uneven, Brittle

Not Available

1.6 Cleavage

Imperfect on {001}, indistinct on {011}

Perfect on {10 1 0}

1.7 Mohs Hardness

2.5-32-2.5

2 10

1.8 Chemical Composition

Not Available

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

Stolzite and Ettringite Chemical Formula

While comparing Stolzite 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 Stolzite and Ettringite chemical formula.

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

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Stolzite and Ettringite Specific Gravity

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