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Calcite
Calcite

Chalcedony
Chalcedony



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Calcite
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Chalcedony

Calcite and Chalcedony Physical Properties

Physical Properties

Tenacity

Brittle
-

Solubility

Soluble
Soluble

Durability

-
-

Specific Gravity

2.67-2.732.55-2.70
1 7.18
👆🏻

Fracture

Conchoidal
Uneven, Splintery, Conchoidal

Cleavage

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

Mohs Hardness

36.5-7
2 10
👆🏻

Chemical Composition

CaCO 3Ulrich Henn and Claudio C.
SiO2

Calcite and Chalcedony Chemical Formula

While comparing Calcite 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 Calcite and Chalcedony chemical formula.

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

Calcite and Chalcedony Specific Gravity

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