Oval pendant top using green and black natural stone - Base material: Silver 925 - Design: Oval pendant - Stone type: Unknown natural stone - Color: Mixture of green and black - Size: Approximately 4cm x 3cm Purchased in Argentina about 40 years ago There is a hallmark, but the details of the natural stone are unknown. Please understand that this is a vintage/used item before purchasing. As it is an old item, there are scratches and stains due to aging, so please check the photos carefully. Thank you for viewing.