All measurements are approximate: Ring sits at 4 1/4 on a ring mandrel, 9.5mm x 4.5mm (opal piece), 6.4g Item is in good condition. Includes some light scratches and embedded dirt near the stone. Will require some light cleaning/polishing. This item was tested using a JSP acid scratch test and tested as non-magnetic. There are no metal markings on the band. Items are not professionally tested and may be incorrect. All items are sold as-is. If you have any questions regarding this or any item in my closet, please feel free to ask. Thanks for stopping by!