Pyromorphite and Ettringite Physical Properties

Pyromorphite

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

6.5-7.11.77

1 7.18

1.5 Fracture

Uneven, ConchoidalArthur Thomas, Brittle, Metallic

Not Available

1.6 Cleavage

Imperfect- [10 1 1]

Perfect on {10 1 0}

1.7 Mohs Hardness

3.5-42-2.5

2 10

1.8 Chemical Composition

Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)

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

Pyromorphite and Ettringite Chemical Formula

While comparing Pyromorphite 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 Pyromorphite and Ettringite chemical formula.

Chemical formula of Pyromorphite- Pb 5(PO 4) 3ClArthur Thomas , Gemstones (2009)
Chemical formula of Ettringite- Ca 6Al 2(SO 4) 3(OH) 12 26H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Compare Green Gemstones

Pyromorphite Vs Sapphire

Pyromorphite Vs Rutilated Quartz

Pyromorphite Vs Sapphirine

Pyromorphite and Ettringite Specific Gravity

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