 Surviving stones used in decoration are semi-precious ones, with amber and rock crystal among the commonest, and some garnets.Coloured glass, enamel and millefiori glass, probably imported, are also used.The Ardagh Chalice and the Derrynaflan Hoard of chalice, paten with stand, strainer, and basin (only discovered in 1980) are the most outstanding pieces of church metalware to survive (only three other chalices, and no other paten, survive).