7" Cultured Pearl Blueberry Knotted Bracelet with 9ct White Gold Clasp. Beautiful Blueberry Cultured Pearls with Gorgeous Silky Lustre & Exquisite Show. Pearls Measure 10mm to 11mm. Care: Put your pearls on last when getting ready & make them the first thing you take off when you come home. Keep them away from household chemicals including perfume, makeup & hairspray as they will dull the lustre of your pearls. Before putting your pearls away, wipe them with a soft cloth & 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.