This is an amazing pin or brooch from mid century era in a modernist design. The brooch is about 1 1/2 inches long and 11 mm wide. The stone is about 19 mm long, 9.5 mm wide and estimated about 11.5 carats. The stone is decorated with geometric squares at the ends. I see no hallmarks, gold has been tested as 14K yellow gold. The tourmaline has a rich forest green with a blue undertone under certain angles. It weighs a nice 9.1 grams. Good condition, I see no issues.