Ettringite and Sunstone Physical Properties

Ettringite

Sunstone

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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

1.772.62-2.65

1 7.18

1.5 Fracture

Not Available

Gemstones of the world (2001)

1.6 Cleavage

Perfect on {10 1 0}

001

1.7 Mohs Hardness

2-2.56

2 10

1.8 Chemical Composition

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

Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

Ettringite and Sunstone Chemical Formula

While comparing Ettringite and Sunstone 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 Sunstone chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Sunstone- Microcline: KAlSi₃O₈ Oligoclase: (Na,Ca)Al_1-2Si_3-2O₈

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Ettringite and Sunstone Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Sunstone Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Sunstone Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 2.62-2.65 whereas that of Sunstone is 2.62-2.65.