Stamped Sterling Silver 925 Modernist Pendant Necklace

19-inch long chain necklace w/a modernist round pendant w/colorful gemstones (?) The pendant has a diameter of 1.75 inches. There is some very minor surface wear. Only the pendant is stamped, so I don’t know if the chain is sterling & have priced accordingly. All items $15 or less are buy 1, get 1 free. All items, including lots, are buy 1, get 1 50%.