Queen Mary’s brooch incorporates a deep-pink conch pearl weighing 24.9 carats (99.6 grains) as its centerpiece. The triangular shape of the brooch seems to have been dictated by the almost similar shape of the conch pearl. The lower end of the brooch consists of a rectangular extension from the base of the triangle, from which a second oval shaped deep-pink conch pearl with a silky sheen and having a weight of 28.1 carats (112.4 grains) is suspended as a pendant. Islamic jewelry

Queen Mary’s brooch incorporates a deep-pink conch pearl weighing 24.9 carats (99.6 grains) as its centerpiece. The triangular shape of the brooch seems to have been dictated by the almost similar shape of the conch pearl. The lower end of the brooch consists of a rectangular extension from the base of the triangle, from which a second oval shaped deep-pink conch pearl with a silky sheen and having a weight of 28.1 carats (112.4 grains) is suspended as a pendant.