Travertine is a compacted form of limestone that forms in rivers and hot springs. Water, especially river water, has a lot of minerals in it. Sometimes these minerals become deposited on the river bed. These wet minerals then dry out, and combine in compositions at the chemical level. When the minerals deposited are calcium and carbon, sometimes they form a stone that is known as travertine. The chemical composition of travertine is CaCO3 which means that there is one part calcium for every three.
� Tumbled � the travertine is literally tumbled with gravel and bearings, giving it a rough-hewn, aged appearance.
This was historically a very important stone for ancient architecture. Travertine today can be quarried in turkey, china, the U.S. and europe.
Author: Joey Lewitin
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