I bought an Ostrich egg to make a slump mold for my ceramic work. After casting the inside of the thick end of the egg, I had lots of material to do something else with. I immediately thought of making a cabochon.. I traced around the outside of an open back bezel with a sharpie.
Next I cut through the line with a small rotary diamond wheel. Any rotary tool with a diamond bit can handle the thick egg shell quickly.
Now I have a rough and slightly oversize oval about 30x40 mm. This will get pared down to fit the bezel. Next time I will show how I complete the shape.
