Opal replacement after fossil Mussel
Miniature, 3.9 x 2.0 x 1.0 cm
Coober Pedy, South Australia, Australia

An unusually sharp, very well-preserved, fossil mussel shell that has been completely replaced by opal, classic for this one opal deposit in all the world. It is 12.3 carats of sparkling color play! Photo by Joe Budd. Comes with a custom lucite base. View a 360 degree video at