Amethyst and Erythrite Physical Properties

Amethyst

Erythrite

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1 Physical Properties

1.1 Tenacity

Not Available

Sectile

1.2 Solubility

insoluble in common solvents

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.653.06

1 7.18

1.5 Fracture

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

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

1.6 Cleavage

Indiscernible

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

1.7 Mohs Hardness

7Not Available

2 10

1.8 Chemical Composition

SiO₂

Co3(AsO4)2•8(H2O)

Amethyst and Erythrite Chemical Formula

While comparing Amethyst and Erythrite 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 Amethyst and Erythrite chemical formula.

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

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Amethyst and Erythrite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Amethyst and Erythrite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Amethyst and Erythrite Optical Properties during the identification of gemstone. Specific gravity of Amethyst is 3.06 whereas that of Erythrite is 3.06.