This is an antique silver plated (probably over brass) and turquoise clasp for a bracelet or a necklace and from China. These are quite hard to find. The slide in clasp easily comes out and then back in. Would be perfect to add to an existing piece of jewelry or to create another. Circa 1900. Very rare.
Size: 1 1/4" x 1 1/4"; Grams: 15
Condition: Excellent vintage - I have only lightly buffed, you may wish to polish more - wear to the silver plate so that the brass is showing through