Gedrite and Austinite Physical Properties

Gedrite

Austinite

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Physical Properties

Tenacity

Brittle

Solubility

Easily soluble in cold dilute HCl

Durability

Specific Gravity

3.15-3.2594.12

1 7.18

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Fracture

Uneven

Cleavage

Gedrite Magnesiogedrite , Comments: Dark gray cleavage fragment of magnesiogedrite (gedrite). , Location: Bamble, Telemark, Norway. , Scale: See Image.

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

Mohs Hardness

5.5-64-4.5

2 10

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Chemical Composition

(Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)

CaZn(AsO4)(OH)

Gedrite and Austinite Chemical Formula

While comparing Gedrite 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 Gedrite and Austinite chemical formula.

Chemical formula of Gedrite- (Mg,Fe2+ ) 2[(Mg,Fe2+ ) 3Al 2](Si 6Al 2)O 22(OH) 2Anthony et al , Handbook of mineralogy (2001)
Chemical formula of Austinite- CaZn(AsO4)(OH)

Compare Brown Gemstones

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Gedrite and Austinite Specific Gravity

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