William deLillo and Robert Clark opened their company The House of William de Lillo in 1967 and closed in the mid 1970s, when they moved to France to make a line of men's jewelry. This magnificent necklace has stations with 3/4" large faux amethysts with clear rhinestones on each side. Little silver tone jump rings attach the stations. The necklace is 19" including extender. Marked deLillo on a hang tag. Excellent vintage condition. Carroll, 101, page 157, says the prices for de Lillo are expensive and rising.