14kt yellow gold 14kt yellow gold Marco Perle single earring from SOPHIE BILLE BRAHE featuring post-back fastening, small hoop design, freshwater pearls and for pierced ears. Please consider that this is sold as a single earring.. Pearls should be the last thing that you put on in the morning and the first thing you take off at night. Avoid contact with perfumes or creams, and simply wipe with a soft cloth to clean..