Ettringite and Emerald Physical Properties

Ettringite

Emerald

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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

Hard

1.4 Specific Gravity

1.772.67-2.78

1 7.18

1.5 Fracture

Not Available

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

1.6 Cleavage

Perfect on {10 1 0}

Imperfect on the [0001]

1.7 Mohs Hardness

2-2.57.5-8

2 10

1.8 Chemical Composition

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

Be₃Al₂SiO₆

Ettringite and Emerald Chemical Formula

While comparing Ettringite and Emerald 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 Emerald chemical formula.

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

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Ettringite and Emerald Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Emerald Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Emerald Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 2.67-2.78 whereas that of Emerald is 2.67-2.78.