Georgian and Regency coloured wine glasses were a response to the vivid colours of contemporary 18th century polychrome porcelain. Coloured glass has been made for thousands of years but the combination of colour and form during the latter 18th century period results in stunning pieces that are not surpassed for many a collector. We are all familiar with Bristol blue and green wine glasses. The colours result from the addition of metal compounds to the glass. Manganese was added to continental glass to remove the green colourations given by iron in soda glass. When the concentration of manganese is increased then amethyst colours are achieved. A personal favourite, regency red glass, requires the addition of gold in small quantities. Nickel produces a violet colour with soda glass and purple with lead glass. Later uranium (oxide) glass was not such a novel idea, the Egyptians started the process, it was simply a newly discovered metal.