Ettringite and Fluorite Physical Properties

Ettringite

Fluorite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Partially soluble in water

slightly water soluble and in hot hydrochloric acid

1.3 Durability

Not Available

1.4 Specific Gravity

1.773.00-3.25

1 7.18

1.5 Fracture

Not Available

Subconchoidal, Uneven, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references

1.6 Cleavage

Perfect on {10 1 0}

Octahedral, perfect on {111}, parting on {011}

1.7 Mohs Hardness

2-2.54

2 10

1.8 Chemical Composition

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

CaF₂

Ettringite and Fluorite Chemical Formula

While comparing Ettringite and Fluorite 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 Fluorite chemical formula.

Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)
Chemical formula of Fluorite- CaF₂

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Ettringite and Fluorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Ettringite and Fluorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Ettringite and Fluorite Optical Properties during the identification of gemstone. Specific gravity of Ettringite is 3.00-3.25 whereas that of Fluorite is 3.00-3.25.