Archaen butterstone* bezel set in sterling silver. Ring is size 9.   

*Butterstone (sometimes called Butter Jade or African Jade) is an ancient stone found in the greenstone belt of Southern Africa. It dates to over 2500 million years ago. It was formed during the Archean Period when the continents were just forming. Many pieces contain evidence of the beginnings of life on Earth in the form of micro fossils of Blue Green Algae. Butterstone is extremely smooth to the touch and gives a comforting tactile experience.