This is a beautiful piece of fossil coral, also called coral agate or agitated coral. The bumpy surfaces shows the natural structure of coral, while the polished side shows the vivid floral pattern of coral when sliced open.
Fossil corals were naturally formed million years ago, when silica in ocean started to harden around corals and eventually replaced the coral content. It is a kind of agate in coral’s original structure - an elegant way the nature uses to preserve the beauty of coral forever. Crystals often grow around agate and form geodes.

measurements: about 2 1/4x 1 5/8 x 1/4 inch
                          
weight: 24 gram 

One of a kind; you will receive the exact crystal pictured. B255

I am happy to combine shipping! Packages within U.S. will be shipped through USPS first class.