Keystone is a coral composed of the fossilized remains of thousands of tiny marine animals. This very hard, durable coral keystone formed some enormous reefs millions of years ago. The patterns formed in this coral are amazingly intricate and beautiful. I have attempted to simplify some of these into designs. Here is a delicate, circular pattern in black on a textured gray background. There is no doubt this design as a focal point in your living room would spark interesting conversation.


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