Halcyon Days Halcyon Days' enamels and porcelain are incomparable collectors' items, gifts par excellence. They are direct descendants of the rare and beautiful enamels of 18th-century England. Prized by collectors all over the world, both as tokens of taste and sentiment and as small works of art, they are the antiques of tomorrow. Each one is fitted into an elegant presentation case in the company's pale blue and mocha house colours.