Necklaces / Pendants by gill forsbrook Pendant of 6 carved quartz beads with cream polypropylene curl on cream nylon thread. Features Primary Material : polypropylene Other Materials : nylon thread and quarts beads Length (inches) : 30 One of a Kind : No Hallmarked : No Cleaning InstructionsClean plastic and stones by gently wiping with a soft damp cloth or cotton wool, a little mild soap may be used.Nylon thread may be washed in cool water with a little mild soap, rinsed then gently patted with kitchen towel and left to dry naturally.As with all jewellery avoid spraying with perfume and hairspray.Prolonged exposure to sunlight (continuous exposure over a period of years, as in a peice being on disply in a window for many years ) can cause some plastic to become brittle.