Quartz and Chalcedony Physical Properties

Quartz

Chalcedony

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

2.65

2.55-2.70

1.5 Fracture

Conchoidal, Conchoidal, Brittle, Gems

Uneven, Splintery, Conchoidal, Uneven, Splintery, Conchoidal, UnevenWalter Schumann

1.6 Cleavage

{0110} Indistinct

Absent

1.7 Mohs Hardness

6.5-7

1.8 Chemical Composition

SiO₂

Quartz and Chalcedony Chemical Formula

While comparing Quartz and Chalcedony 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 Quartz and Chalcedony chemical formula.

Chemical formula of Quartz- SiO₂
Chemical formula of Chalcedony- SiO₂

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Quartz and Chalcedony Specific Gravity

Another important criteria for qualitative analysis of gemstones is Quartz and Chalcedony Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Quartz and Chalcedony Optical Properties during the identification of gemstone. Specific gravity of Quartz is 2.55-2.70 whereas that of Chalcedony is 2.55-2.70.