*Free Postage on Orders Over £75 (UK Only)

What is Limestone?

rough limestone

Limestone Rich Fossil Content

Limestone a relatively soft sedimentary rock made up primarily of calcium carbonate.  This chemical compound occurs in rocks as the minerals calcite and aragonite.

Large quantities of limestone are formed from the skeletal remains of marine organisms left behind after they die.  It usually forms in clear, calm, warm and shallow bodies of water.

caliche sedimentary rocks

Limestone is a soft mineral so scratches easily.

Colour is usually an even white to off-white.  The lustre is dull which means the stone absorbs light instead of reflecting it. 

Chalk, travertine and coral are all examples of limestone.

Limestone can form very slowly over millions of years from the evaporation of water in caves.  Stalactites and stalagmites which are limestone are formed in this way.

Article Photos

The limestone in our first photo is from Arizona. The photo which is courtesy of Stan Celestian is clickable and redirects to the original non-compressed image.

The second photo is caliche. This sedimentary rock is made up of a hardened natural cement of calcium carbonate. It binds other materials like gravel, sand, clay and silt.

Recently Viewed Products

Available Right Now
Online Support

Have a Question? Chat with Us.

Start Chat with