Successful Firing of Sensitive Gemstones uisng Activated Carbon

Aqua Czs fired in Silver Metal Clay (using activated carbon to preserve colour) Last week, I test fired the new gemstones that had arrived at BeadFx (posted o7/04/10). The one stone I was most excited about was an Aqua Cubic Zirconia which sadly failed my original kiln and torch firing tests. The stones turned brownish: Left stone (brownish) is the result of (open) kiln firing aqua czs. Right stones are unfired aqua czs. I was disappointed by I had one last test to try, which I did this week. Firing the piece in a kiln embedded in activated carbon, and …