Erythrite and Amethyst Physical Properties

Erythrite

Amethyst

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1 Physical Properties

1.1 Tenacity

Sectile

Not Available

1.2 Solubility

Not Available

insoluble in common solvents

1.3 Durability

Not Available

1.4 Specific Gravity

3.06

2.65

1.5 Fracture

Sectile Curved shavings or scrapings produced by a knife blade, (e.g. graphite).

Conchoidal, ConchoidalWalter Schumann, Gemstones of the world (2001)

1.6 Cleavage

Perfect on {010}; poor on {100} and { 1 02}.

Indiscernible

1.7 Mohs Hardness

Not Available

1.8 Chemical Composition

Co3(AsO4)2•8(H2O)

SiO₂

Erythrite and Amethyst Chemical Formula

While comparing Erythrite and Amethyst 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 Erythrite and Amethyst chemical formula.

Chemical formula of Erythrite- Co3(AsO4)2•8(H2O)
Chemical formula of Amethyst- SiO₂

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Erythrite and Amethyst Specific Gravity

Another important criteria for qualitative analysis of gemstones is Erythrite and Amethyst Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Erythrite and Amethyst Optical Properties during the identification of gemstone. Specific gravity of Erythrite is 2.65 whereas that of Amethyst is 2.65.