Quartz crucible GIRtech FUSION QZ Quartz crucible for precious metals melting and laboratory tests Quartz crucible GIRtech FUSION QZ is designed: – for fusing precious and non-ferrous metals (gold, silver, platinum, copper, etc.); – for laboratory tests for carbon and sulfur content in fusions; – for work with acidic and neutral substances at temperatures >1830°F. It could not be used for handling alkaline agents Could be used in electric, induction and gas stoves. Operating temperature till 2280°F. Before melting, the inner crucible surfaces require pre-treatment with boron-containing substances (borax)