Hi there

I'm a Level II Instructor of Art CLay Silver based in Edinburgh.
Feel free to ask any questions - there are a few metal clay fanatics that post on here, who, like myslef will be happy to help. With regard to which stones you can fire on your gas hob - your looking at cubic zicornias or CZ's. You can fire other materials - glass, porcelain etc with the clay but you need a kiln for that.
As for fingerprints. You need a decent moulding compound. take a mould of the fingerprint and then take a mould of the mould which will give you something to impress into the clay. Its straightforward. If you are unsure how to do it then the good news is that good moulding compounds are not expensive and you could practice on polymer clay.
Hope that helps.
