Vintage Natural African light Amethyst gemstone on adj 925 sterling silver ring

Vintage Natural African light Amethyst gemstone on adj 925 sterling silver ring. Ring is adjustable to size- see picture - at its actual size without expansion is at size 6. Beautiful gemstone purchased when we lived in Comoros Islands, Africa back in 1972. Measurements of stone approximately 9/16th” not quite a half “. None smoking home. Priced at as is condition. Don’t like my price make reasonable offer.