Polyhalite and Eosphorite Physical Properties

Polyhalite

Eosphorite

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.783.05-3.08

1 7.18

1.5 Fracture

Conchoidal, Brittle

Subconchoidal, Uneven, Conchoidal, Uneven

1.6 Cleavage

Perfect on {10 1 }; parting on {010}

Poor on {100}

1.7 Mohs Hardness

3.55

2 10

1.8 Chemical Composition

Not Available

Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Polyhalite and Eosphorite Chemical Formula

While comparing Polyhalite and Eosphorite 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 Polyhalite and Eosphorite chemical formula.

Chemical formula of Eosphorite- Mn2+ Al(PO 4)(OH) 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Polyhalite and Eosphorite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Eosphorite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Eosphorite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 3.05-3.08 whereas that of Eosphorite is 3.05-3.08.