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Kota Brown
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Chittor Black

black-stone
Place of Origin : Chittorgarh 

Physical Properties

Physically, Limestone are Quite impervious, Hard, Compact, fine to very fine grained calcareous rocks of sedimentary nature.

Hardness 3 to 4 on Moh’s Scale
Density 2.5 to 2.65 Kg/m3
Compressive Strength 1800 to 2100 Kg/cm2
Water Absorption Less than 1%
Porosity Quite low
Weather Impact Resistant

 

Chemical Properties

Chemically, both limestone and marbles are siliceous calcium carbonate rocks.
Lime (CaO) 38-42%
Silica (SiO2) 20-25%
Alumina (Al2O3) 2-4%
Other Oxides like Na, Mg 1.5 to 2.5%
Loss On Ignition (LOI) 30-32%

 

Limestone, like marble and other calcareous stones, are referred to as acid sensitive. Calcareous stones are readily dissolved in acid, therefore acidic products should not be used on limestone and marbles.

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