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Milk Opal
Milk Opal

Austinite
Austinite



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Milk Opal
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Austinite

Milk Opal and Austinite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
Easily soluble in cold dilute HCl

Durability

-
-

Specific Gravity

1.98-2.504.12
1 7.18
👆🏻

Fracture

Conchoidal
Uneven

Cleavage

None
Good in two directions parallel to the prism faces {110}

Mohs Hardness

5.5-6.54-4.5
2 10
👆🏻

Chemical Composition

SiO2·nH2O
CaZn(AsO4)(OH)

Milk Opal and Austinite Chemical Formula

While comparing Milk Opal and Austinite 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 Milk Opal and Austinite chemical formula.

  • Chemical formula of Milk Opal- SiO2·nH2O
  • Chemical formula of Austinite- CaZn(AsO4)(OH)

Milk Opal and Austinite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Milk Opal and Austinite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Milk Opal and Austinite Optical Properties during the identification of gemstone. Specific gravity of Milk Opal is 4.12 whereas that of Austinite is 4.12.