Young Fish Brooch in 18K Yellow Gold with Aquamarine | Ole Lynggaard Copenhagen. Created by Sofia Lynggaard Normann, the Young Fish brooch is handcrafted in 18 karat yellow gold and set with a luminous 11 mm aquamarine. The gold is satinised by hand, giving the piece a refined, textured finish that highlights its organic form. Wear it as a statement on its own or style it with pendants (sold separately). From the captivating Young Fish Collection. Material: Gold Karat: 18K Stone: Aquamarine