This pendant has volume to it, with the way the lichen is stacked around the two Hairy-stalked Collybia mushrooms (Gymnopus spongiosus). It almost looks like a wave of lichen about to crash over. Now cured, the lichen and mushrooms are very  durable and stiff. Comes on a chain, with decorative box and suspected identification list. 
 
Another neat fact is that the ruffle lichen turned an almost neon yellow/green as soon as the epoxy resin made contact with it, and it has now faded to a yellow-ish color. It was startling to see at first.