Quartz and Ettringite Physical Properties

Quartz

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

2.651.77

1 7.18

1.5 Fracture

Conchoidal, Conchoidal, Brittle, Gems

Not Available

1.6 Cleavage

{0110} Indistinct

Perfect on {10 1 0}

1.7 Mohs Hardness

72-2.5

2 10

1.8 Chemical Composition

SiO₂

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

Quartz and Ettringite Chemical Formula

While comparing Quartz 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 Quartz and Ettringite chemical formula.

Chemical formula of Quartz- SiO₂
Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Quartz and Ettringite Specific Gravity

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