This is a gorgeous vintage 1970s art deco repro sterling silver marcasite and green onyx brooch that measures approximately 2" in diameter. It has a good working rollover clasp and is marked 925. There is a chip on the edge of the stone on the back near the clasp, but this cannot be seen at all from the front. All the marcasites are present and the front of the stone is pristine. This has such a great art deco design!