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Apophyllite
Apophyllite

Austinite
Austinite



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Apophyllite
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Austinite

Apophyllite and Austinite Physical Properties

Physical Properties

Tenacity

-
Brittle

Solubility

-
Easily soluble in cold dilute HCl

Durability

-
-

Specific Gravity

2.30-2.504.12
1 7.18
👆🏻

Fracture

Uneven
Uneven

Cleavage

Perfect on (001)
Good in two directions parallel to the prism faces {110}

Mohs Hardness

4.5-54-4.5
2 10
👆🏻

Chemical Composition

KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
CaZn(AsO4)(OH)

Apophyllite and Austinite Chemical Formula

While comparing Apophyllite 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 Apophyllite and Austinite chemical formula.

  • Chemical formula of Apophyllite- KCa 4Si 8O 20(F,OH) · 8H 2OUlrich Henn and Claudio C.
  • Chemical formula of Austinite- CaZn(AsO4)(OH)

Apophyllite and Austinite Specific Gravity

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