Charoite and Austinite Physical Properties

Charoite

Austinite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Easily soluble in cold dilute HCl

1.3 Durability

Not Available

1.4 Specific Gravity

2.54-2.784.12

1 7.18

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009)

Brittle, Uneven, Brittle, Uneven

1.6 Cleavage

Good in three directions

Good in two directions parallel to the prism faces {110}

1.7 Mohs Hardness

5-64-4.5

2 10

1.8 Chemical Composition

K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references

CaZn(AsO4)(OH)

Charoite and Austinite Chemical Formula

While comparing Charoite 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 Charoite and Austinite chemical formula.

Chemical formula of Charoite- K(Ca,Na) 2Si 4O 10(OH,F) · H 2OMichael OâDonoghue , Gems, Sixth Edition (2006) More from other references
Chemical formula of Austinite- CaZn(AsO4)(OH)

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Charoite and Austinite Specific Gravity

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