This opal has lots of fire and changes in every light. Set in 18k gold it measures 3/8" x 5/16" on a textured base measuring 9/16" x 1/2". Top width of the band is 1/4", bottom tapers down to 1/8" making it comfortable to wear. Oxidized sterling silver with highlights. As with all rings the finish will change with each persons use. Size 6 1/2 plus.