Emerald and Ettringite Physical Properties

Emerald

Ettringite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

Not Available

Partially soluble in water

1.3 Durability

Hard

Not Available

1.4 Specific Gravity

2.67-2.781.77

1 7.18

1.5 Fracture

Uneven, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001)

Not Available

1.6 Cleavage

Imperfect on the [0001]

Perfect on {10 1 0}

1.7 Mohs Hardness

7.5-82-2.5

2 10

1.8 Chemical Composition

Be₃Al₂SiO₆

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

Emerald and Ettringite Chemical Formula

While comparing Emerald 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 Emerald and Ettringite chemical formula.

Chemical formula of Emerald- Be₃Al₂SiO₆
Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Emerald and Ettringite Specific Gravity

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