Calcite and Agate Physical Properties

Calcite

Agate

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1 Physical Properties

1.1 Tenacity

Brittle

Not Available

1.2 Solubility

Soluble

Not Available

1.3 Durability

Not Available

1.4 Specific Gravity

2.67-2.73

2.60-2.64

1.5 Fracture

Conchoidal, ConchoidalArthur Thomas, Gemstones (2009), ConchoidalArthur Thomas, Gemstones (2009), Brittle, Conchoidal

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

1.6 Cleavage

Perfect on [10 1 1] three directions with angle of 74° 55

Indiscernible

1.7 Mohs Hardness

6.5-7

1.8 Chemical Composition

CaCO 3Ulrich Henn and Claudio C.

SiO₂

Calcite and Agate Chemical Formula

While comparing Calcite and Agate 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 Calcite and Agate chemical formula.

Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.
Chemical formula of Agate- SiO₂

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Calcite and Agate Specific Gravity

Another important criteria for qualitative analysis of gemstones is Calcite and Agate Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Calcite and Agate Optical Properties during the identification of gemstone. Specific gravity of Calcite is 2.60-2.64 whereas that of Agate is 2.60-2.64.