Sterling Silver 10mm Black Freshwater Pearl Stud Earrings. E631. These classic Black pearl stud earrings feature 10mm button shaped freshwater pearls, set on sterling silver post and butterfly fastenings. Perfect for everyday wear, pearls are perhaps the best loved gem of all time, and are easy to match with any outfit. The simplicity of the design lends itself perfectly to wedding jewellery. The pearl collection has been designed and hand crafted within our workshop in Ashbourne.