A pearl set cocktail ring from A B Davis, with a round fresh water pearl set in a sterling silver swirl, finished with glittering cubic zirconia. This ring is size N. Other sizes are available to order in John Lewis stores. Care instructions: When cared for properly, pearls can last a lifetime. Put your pearls on last when getting ready and make them the first thing you take off when you come home. Keep them away from household chemicals including perfume, makeup and hairspray as they dull the lustre of your pearls. Before putting your pearls away, wipe them with a soft cloth and store them separately from other jewellery to avoid scratching their tender surfaces. The best way to care for your pearls is to wear them regularly, as the body's natural oils keep pearls lustrous.