Here's a large-ish freeform cut cabochon of Abalone Shell. Looks very colorful as light moves across it; reflections on the surface move in the opposite direction as the flash in the cabochon.

These were photographed on an Obsidian slab since I was in a remote location at the time, away from my photography "stuff" at home.

Dimensions: 37mm x 32mm x 7mm.  Weight: 16.45 carats.

ABA001 - $20.00