Polyhalite and Dioptase Physical Properties

Polyhalite

Dioptase

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1 Physical Properties

1.1 Tenacity

Brittle

1.2 Solubility

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.783.25-3.35

1 7.18

1.5 Fracture

Conchoidal, Brittle

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001) More from other references, Conchoidal, Brittle

1.6 Cleavage

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

Perfect in three directions

1.7 Mohs Hardness

3.55

2 10

1.8 Chemical Composition

Not Available

CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Polyhalite and Dioptase Chemical Formula

While comparing Polyhalite and Dioptase 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 Dioptase chemical formula.

Chemical formula of Dioptase- CuSiO 2(OH) 2Michael OâDonoghue , Gems, Sixth Edition (2006) More from other references

Compare Red Gemstones

Polyhalite Vs Vanadinite

Polyhalite Vs Jacinth

Polyhalite Vs Heliotrope

Polyhalite and Dioptase Specific Gravity

Another important criteria for qualitative analysis of gemstones is Polyhalite and Dioptase Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Polyhalite and Dioptase Optical Properties during the identification of gemstone. Specific gravity of Polyhalite is 3.25-3.35 whereas that of Dioptase is 3.25-3.35.