The Poltimore Tiara, given to Princess Margaret on her wedding day by her sister HM Queen Elizabeth II. For me this is the most beautiful tiara in the Queens collection! Probably (again, for me) the most beautiful tiara in the world.
Nocturne Pendant by Klara Borbas. Each concave polymer disc is a different shade of gray. Some has a Mother of pearl sheen. The polymer piece is attached to a stainless steel wire that hangs on a rubber cord with silver clasp.