This vintage ring is made of solid sterling silver set with about 10 carats of total gem weight of green onyx and marcasites. This is a classic, bold, vintage design with a ring face of approximately 17 x 23 mm. The total ring weight is about 5 grams. It has a lovely center stone of translucent green onyx cut in a smooth cabochon. The marcasites add great sparkle. Size 6, can be sized by your jeweler.