Calcite

Calcite on Calcite

Calcite is formed when water dissolves limestone and it drips depositing the calcite, calcium carbonate.  Limestone, not a very colorful stone, is grayish.  Limestone is a sedimentary rock and is formed at the bottom of a shallow sea by the skeletal fragments of coral, mollusks, and forams.  Later, rainwater falls on the limestone, dissolving it with the carbonic acid created when the CO2 in the air dissolves into the H20 in the air.  This weak acid drains down cracks in the limestone and deposits the calcite.

 Calcite comes in many colors depending the color of its impurities. The calcite above is whitish and brownish.  You can find it in almost any color at ebay.  

Orange Calcite

  Orange calcite is said to have healing properties.

Calcite on Calcite

You can see some of its granular properties in this image.

 

 

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