Test Results – Firing the new Lab Created Gems

At the beginning of August – we added some Lab Created Gems for use in Metal Clay. A couple of the gals here who work with metal clay extensively wanted to double check that the stones would handle the heat without significant colour change. To test them, they were placed into a kiln and fired, without being embedded in metal clay. For the first firing, the gems were placed into a cold kiln. Ramp rate (speed of temperature increase) was set to full (as fast as the kiln will go), the temperature was set to 1650 degrees Fahrenheit (the hottest …