Upgrade your existing lighting or add a distinctive finishing touch to any table lamp with a designer lamp finial. Crafted from a genuine polished ammonite fossil trimmed with a silver tone ammonite "body"- an imagining of how it may have appeared in ancient times. (Ammonites went extinct over 65 million years ago, but were recorded in the fossil record up to 400 million years ago.) Handmade in Wisconsin. Meticulously prong-set and fixed with jeweler's-grade adhesives. The knurled chrome finial base(s) will fit a standard-size lamp harp with a 1/4" stem.