A very large nut. For the times when small nuts won't do. You could use it in a pinch on a large project, or swing this around and bop someone pretty good if necessary. A utilitarian, luxurious piece 

But really- this is a truly elegant pendant, simple and symbolic for a variety of reasons, lovely  to touch and float down a chain. Opening is generous - fits dog clips and most clasps like a charm. 

A hefty solid 16g of 14k. Just a chunk. 15mm exterior diameter, the inner diameter is about 9mm. This one is available, and once sold can be made to order. Please allow four weeks for that.