A simple and easy way for anybody to quickly assess whether or not a piece of glass is handmade is to look for the tell tale signs in the appearance. The first thing to look for are cutting marks or rod marks that signify the place where the glass was attached to the blowpipe and cut off. Items like wine glasses or vases would have such marks visible underneath the base. Depending on the shape of the item there may be pinch marks, for example on handles or lips of jugs. Next raise the glass up towards the light and...