الحجر الجيري

Limestone Mineral is a rock made of calcite. Most limestone is grey, but all colors of limestone from white to black have been found
Scientists test natural rock to see if it is limestone by pouring cold diluted hydrochloric or sulfuric acid (10% solution or vinegar) on it. Limestone gives off bubbles of carbon dioxide

:Uses of limestone

Acid rain – neutralization of acid lake waters –

Agriculture – soil stabilization and pH control –

 Air quality – neutralizes sulfur dioxide gases from industrial processes such as smelting metal ores and coal fired generating stations

Aluminum –

Aggregate for concrete and road building –

Artificial waterfalls –

Building construction – bricks, mortar, plasters –

Candles –

Cement –

Ceramics –

Concrete –

Cosmetics –

Cotton – bleach –

Glass –

Glue –

Gelatin –

Landscaping –

Neutralizing acid mine drainage –

Oil – purification of oils and gasoline –

Ore extraction –

Paint –

Paper production –

Pesticides –

Plastics –

Poultry grit – shell-forming material –

Roadbeds –

Rubber –

Soap –

Soda Pop – makes the bubbles in pop –

Smelting Iron Ore –

Steel making –

Sugar, purification of sugar beets –

Tanning of leather –

Tomb Stones –

Toothpaste –

Wastewater treatment – removes phosphorous and nitrogen –

Odor control, kills bacteria and aids in clarification –

Water Treatment – drinking water clarification –

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