This delicate little amonite pendant is made from fine silver and handcrafted from a mould I made of a real fossil.  I love it.  It is small and delicate, maybe even small enough to be a charm.
 
The amonite is approx 14mm in diameter at it's widest point with a further 5mm for the added bail.  It comes on a sparkly bright 18" popcorn chain.