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Austinite
Austinite

Faustite
Faustite



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Austinite
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Austinite and Faustite Physical Properties

Physical Properties

Tenacity

Brittle
-

Solubility

Easily soluble in cold dilute HCl
-

Durability

-
-

Specific Gravity

4.122.9
1 7.18
👆🏻

Fracture

Uneven
Conchoidal

Cleavage

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

Mohs Hardness

4-4.54.5
2 10
👆🏻

Chemical Composition

CaZn(AsO4)(OH)
(Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)

Austinite and Faustite Chemical Formula

While comparing Austinite and Faustite 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 Austinite and Faustite chemical formula.

  • Chemical formula of Austinite- CaZn(AsO4)(OH)
  • Chemical formula of Faustite- (Zn,Cu)Al 6(PO 4) 4(OH) 8 · 4H 2OMichael O’Donoghue , Gems, Sixth Edition (2006)

Austinite and Faustite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Austinite and Faustite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Austinite and Faustite Optical Properties during the identification of gemstone. Specific gravity of Austinite is 2.9 whereas that of Faustite is 2.9.