Hollandite and Calcite Physical Properties

Hollandite

Calcite

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1 Physical Properties

1.1 Tenacity

Not Available

Brittle

1.2 Solubility

Not Available

Soluble

1.3 Durability

Not Available

1.4 Specific Gravity

5.05

2.67-2.73

1.5 Fracture

Brittle, Metallic

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

1.6 Cleavage

Distinct / Good, Prismatic

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

1.7 Mohs Hardness

4-6

1.8 Chemical Composition

Ba(Mn++++,Mn++)8O16

CaCO 3Ulrich Henn and Claudio C.

Hollandite and Calcite Chemical Formula

While comparing Hollandite and Calcite 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 Hollandite and Calcite chemical formula.

Chemical formula of Hollandite- Ba(Mn++++,Mn++)8O16
Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.

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Hollandite and Calcite Specific Gravity

Another important criteria for qualitative analysis of gemstones is Hollandite and Calcite Specific gravity. Specific gravity is the relative density of a gemstone compared with respect to density of water. Gemologists use Hollandite and Calcite Optical Properties during the identification of gemstone. Specific gravity of Hollandite is 2.67-2.73 whereas that of Calcite is 2.67-2.73.