Estate Seidengang Hippocampus Diamond & Gemstone Brooch

This is an estate Seidengang brooch in 18 karat yellow gold. This brooch features a motif of a Hippocampus creature with one round pearl, one square aquamarine, one round pink tourmaline, one round green stone, one heart shaped tourmaline cabochon and 13 round brilliant cut diamonds weighing approximately 0.18ctw. The brooch measures 3.25″ x 1.5″ with a pin back closure. The weight is 18.27 dwt. Hallmarks: SG, 18K. Circa 1980s.