The diameter of the cultured pearl is approximately 5.5 mm, the setting possibly in silver, diameter 9.8 mm, height 13.4 mm, the length of the brooch pin 58 mm. The setting can be unscrewed from the pin and attached to a back piece to become a button/dress stud. The pin is dated 1907, the back piece of the button 1906, in original case, total weight approximately 4.2 grams.
Minor scratches.