While her school friends often wore diamond studs, the future princess usually chose pearls.[67] At the age of 15, Lady Diana Spencer was first seen wearing a pair of simple pearl earrings;[2][page needed] she wore them as a bridesmaid at her sister's wedding. These earrings were among the few pieces of jewellery that were not stolen from the princess while living in her London flat prior to her engagement.[3][page needed] She later wore them for informal occasions during her marriage. The princess last wore them in public on the 3rd July 1990 while opening a new police station at 462 Fore Street, Edmonton, London.[4]