This lovely piece can be worn as a pin/brooch or a pendant on a chain. It is a vintage piece made by the Los Ballesteros Taller Borda (workshop.) There are beautiful colors in the abalone shell or Mother of Pearl that is in the shape of a woman in a flowing dress and she's holding a plant, I believe. Not sure what is in her hand. Lots of different colors: greens, blues, pinks. It has several marks on the back: 925, hecho en mexico, Talleres de los Ballesteros and then the symbol they used. Probably from the 50s - 60s time period. Measures 1 1/2 inches round. In good vintage condition. Some marks on the silver and the MOP has some crazing. Would look fabulous on a jacket, t-shirt or scarf. Thank you for looking and email with any questions.