This necklace made up of large dark grey and natural pearls, made by London jeweller Leo de Vroomen was gifted to the Princess in 1985 by Prince Charles. It appeared in public only twice: on a trip to Austria in April 1986 and a month later when she visited a school in Japan. It is said the Princess did not like it at all and researchers believe it was given in 1985 when their marriage began to fall apart.[1][page needed]