Umbalite and Calcite Physical Properties

Umbalite

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

3.62-4.33

2.67-2.73

1.5 Fracture

Uneven, Uneven, ConchoidalGemdat.org, Management Team (2012)

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

1.6 Cleavage

Not Available

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

1.7 Mohs Hardness

7-7.5

1.8 Chemical Composition

Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)

CaCO 3Ulrich Henn and Claudio C.

Umbalite and Calcite Chemical Formula

While comparing Umbalite 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 Umbalite and Calcite chemical formula.

Chemical formula of Umbalite- Mg 3Al 2(SiO 4) 3 -Mn2+3Al 2(SiO 4) 3Gemdat.org , Management Team (2012)
Chemical formula of Calcite- CaCO 3Ulrich Henn and Claudio C.

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Umbalite and Calcite Specific Gravity

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