I had a lot of fun getting the lights and darks right on this old fossil:
I set the object to be drawn on the table and illuminate it from one side only to get maximum shape definition from the shadows.
Here's a South American fabric printing stone. Drawing all the little patterns and swirls really gives you an appreciation for what an intricate carving job the artist did.
I am quite open to illustrating artifacts on a freelance basis. I can be reached via email at jawogaman (at) gmail (dot) com.