RVD Koninklijk Huis/Wikimedia Commons

Princess Beatrix of the Netherlands wears a pearl necklace with a pearl and amethyst clasp for an official portrait, October 2015; I believe the necklace and accompanying earrings are personally owned by Princess Beatrix

Queen Beatrix of the Netherlands wears her turquoise, diamond, and gold necklace and accompanying earrings for gala performance at the Royal Theatre Carre in Amsterdam, April 2013; the art nouveau necklace and coordinating earrings are both part of Beatrix’s personal jewelry collection, but she occasionally loans them to other family members

Queen Beatrix of the Netherlands wears her diamond and sapphire necklace and its matching earrings for the 25th anniversary concert of the Master Pianists at the Concertgebouw in Amsterdam, March 2012; the modern sapphire and diamond suite is a part of Beatrix’s personal jewelry collection