Amethyst and Catapleiite Physical Properties

Amethyst

Catapleiite

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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

2.652.72

1 7.18

1.5 Fracture

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

Brittle, Metallic, Brittle, Metallic

1.6 Cleavage

Indiscernible

{110} Perfect, {010} Perfect

1.7 Mohs Hardness

75-6

2 10

1.8 Chemical Composition

SiO₂

Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

Amethyst and Catapleiite Chemical Formula

While comparing Amethyst and Catapleiite 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 Catapleiite chemical formula.

Chemical formula of Amethyst- SiO₂
Chemical formula of Catapleiite- Na 2ZrSi 3O 9 · 2H 2OMichael OâDonoghue , Gems, Sixth Edition (2006)

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Amethyst and Catapleiite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Amethyst and Catapleiite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Amethyst and Catapleiite Optical Properties during the identification of gemstone. Specific gravity of Amethyst is 2.72 whereas that of Catapleiite is 2.72.