Yes they are appropriate mourning Jewels. Many royal ladies have worn pearls to funerals and during the official mourning period. A good example is Queen Wilhelmina who was photographed in 1934 wearing a white mourning dress with Pearls after Prince Hendrik had died.
--Previous Message-- : Did Royal Ladies wear pearls for funerals ? : --Previous Message-- : : They seem sapphires, so not mourning jewels : --Previous Message-- : In 1993, just after the death of HM King : Boudewijn. HM Queen Fabiola wore a few times : a set of unknow jewels. Could it be a kind : of mourning-jewels? : : : : : : : : :