Can the stones be heated for use with precious metal clay?
Cubic Zirconia can withstand very high temperatures, but sometimes the colours used cannot. The clear cubic zirconia can easily be fired in a kiln and not discolour. The pink, padparadscha and citrine will probably be ok in the kiln and not change colour, but these have only been tested for use with a blowtorch not a kiln. Blue, and green colours cannot be heated, they will discolour. When the jewellery with the stones in it has been fired, do not cool it rapidly, let it cool slowly or the stones will shatter. I did some testing personally with a blowtorch and a selection of cubic zirconia. I put each gem under the blow torch for 2-3 minutes, here are the results: White 4mm Round – stable White 6mm Round – stable White 6mm Cushion heated for 5 minutes – stable White 10mm Princess – Shattered White 16x12mm Oval – Shattered Hot Pink created Ruby 6mm Cushion – stable & no change in colour Padparadscha 6mm Round – stable & no change in colour Citrine 6mm Cushion – stable & no change in col
