Dendritic limestone looks for all the world like a fossil plant and hence it is labeled a pseudofossil. As we have discussed before, dendrites are manganese oxides which take their name from their branching growth habit (the Greek δένδρον means "tree") . They look rather like the branched projections on the neurons in your brain which also are called dendrites. The bronze overlay on the sterling setting extends the botanical theme. I put a bunny on the back to nibble in the garden.
Solnhofen limestone is famous for its Jurassic fossils including the famous Archaeopteryx and detailed imprints of soft-bodied organisms. Twenty-nine types of pterosaurs ("winged lizard") alone have been found.