Amethyst and Vivianite Physical Properties

Amethyst

Vivianite

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1 Physical Properties

1.1 Tenacity

Not Available

1.2 Solubility

insoluble in common solvents

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.652.64-2.70

1 7.18

1.5 Fracture

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

(e.g. graphite).

1.6 Cleavage

Indiscernible

{010} Perfect

1.7 Mohs Hardness

7Not Available

2 10

1.8 Chemical Composition

SiO₂

Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

Amethyst and Vivianite Chemical Formula

While comparing Amethyst and Vivianite 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 Vivianite chemical formula.

Chemical formula of Amethyst- SiO₂
Chemical formula of Vivianite- Fe 3(PO 4) 2 8H 2OUlrich Henn and Claudio C.

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Amethyst and Vivianite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Amethyst and Vivianite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Amethyst and Vivianite Optical Properties during the identification of gemstone. Specific gravity of Amethyst is 2.64-2.70 whereas that of Vivianite is 2.64-2.70.