On 18th November, 1997, Queen Silvia of Sweden attended the fifth "Childhood's Night", an event organized in the Château de Versailles by the Fondation pour l'enfance (a French charity dedicated to children's protection, presided over by Anne-Aymone Giscard d'Estaing, wife of the former French President Valéry Giscard d'Estaing).
During this event, Queen Silvia wore an oblong diamond (?) brooch that I can not identify. Does anyone know which brooch it is, and if it was wrn on other events?