Quartz crucibles are primarily composed of silicon dioxide, which does not react with other acids except hydrofluoric acid, and is reactive with caustic alkalis and alkali metal carbonates.

Quartz crucibles exhibit excellent thermal stability and can be directly placed on a flame for heating.

Quartz crucibles, like glassware, are fragile and require extra care during use.

Quartz crucibles can be used with potassium hydrogen sulfate (or sodium), sodium thiosulfate (dried at 212 degrees Celsius) as fluxes, with the melting temperature not exceeding 800 degrees Celsius.