Polyhalite and Amblygonite Physical Properties

Polyhalite

Amblygonite

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Physical Properties

Tenacity

Brittle

Solubility

Soluble

Durability

Specific Gravity

2.782.98-3.10

1 7.18

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Fracture

Conchoidal

Sub-Conchoidal, Irregular/uneven, Uneven, Conchoidal

Cleavage

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

[100] Perfect, [110] Good, [011] Distinct

Mohs Hardness

3.56

2 10

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Chemical Composition

K2Ca2Mg(SO4)4·2H2O

(Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

Polyhalite and Amblygonite Chemical Formula

While comparing Polyhalite and Amblygonite 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 Amblygonite chemical formula.

Chemical formula of Polyhalite- K2Ca2Mg(SO4)4·2H2O
Chemical formula of Amblygonite- (Li,Na)Al(PO 4)(F,OH)Michael OâDonoghue , Gems, Sixth edition (2006) More from other references

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Polyhalite and Amblygonite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Amblygonite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Amblygonite Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 2.98-3.10 whereas that of Amblygonite is 2.98-3.10.