Extremely nice piece vintage jewellery !! Stamped 14K to rear it measures 43mm x 36mm & weighs approx 10.7 grams. No makers mark, looks to date to the early 1900s.
Measures 43mm high x 36mm wide and weighs approx 7 grams. The clasp is stamped 14k and the Diamond was tested with a Diamond tester. There are some stress fractures top right edge.