Rhinestones are imitation precious stones of glass or crystal with a mirror coating on the back that gives them a bright, almost diamond-like sparkle. The name comes from the river Rhine, near which glittering quartz crystals were once gathered. The most famous are Austrian Swarovski crystals. Rhinestones are sewn on, glued or set in a mount to add sparkle to a piece without the price of real diamonds. They are indispensable in stage costumes, eveningwear, costume jewellery, footwear and accessories whenever maximum brilliance is wanted. Rhinestones democratised luxury, making the 'diamond' effect accessible. It is a detail of frank, festive glamour that catches and returns every ray of light.