I work mainly in base metal clays, which fire hotter than silver and I've used several of these now, as well as smaller sizes and they have come out flawlessly even over 800°C. No clouding or change of colour. I just make sure to clean the table of the gemstone last thing before firing, in case any metal clay powder has stuck to finger prints, as this can spoil the sparkle. These mixed packs represent very good value.
These lab created stones can be pushed into the wet clay and fired in place. Economy pack of 20, with mixed colours in a 4mm round size. Colours might differ slightly from pack to pack.
These are really lovely and such a good mix
Really pleased with these. Haven't used them yet but plans are forming. Can't wait to have a go.