I used a oval piece of Petoskey Stone ( 14mm x 10mm) in this adjustable size ring. Petoskey is a fossil found here in Michigan and is our state stone. Bezel set in shiny 14kt gold fill to a hammered & shaped bronze band (8.5mm wide). Patina to bring out detail & add to the look of a old treasure. Sealed to hold finish. Size is 6.75, but can go up 1-1.5 sizes. To go down in size just let me know. Figure about 1/2 size up for the width of the band. Thanks for looking!