A nice 1-1/8 inch square/diamond-shapedsetting roughly half red ruby and half green zoisite matrix. I’ve worn this or similar jewelry for winter holidays. Very fine scratches on the gemstone, but you can tell with magnification . The “rails” around the outside are not exactly straight and symmetric; this adds a bit to the charm of a handmade item. Stamped 925 which indicates the metal is sterling silver. Bale is 1/4inch.