This is Limestone.

Limestone... This complex and legendary stone over millions of years, has formed in and around ocean-beds, rivers, lakes and caves throughout the world. Classified as a sedimentary rock, Limestone is a large concentration of calcite, minerals, and other organic substances that are often native to that region. There are many different types of limestones exhibiting a vast range of colors. It’s the density, and composition of the stone that will often reveal to us if it’s origin is a cave, an ocean, a riverbed, or a lake. Limestone is truly a treasure of our history. Imagine if it could talk, what a story it could tell. Imagine. Design.Create it..with Stone. Imaginerealstone.com