Natural Opal and Rose de Franc Solid Gold Designer Ring Possibly EFFY or EF collection Natural Very Large (2ct+) Welo “Confetti” Opal Center Stone is Very Fiery in blue, yellow, orangey hues. Opal measures 10mm x 7mm. 2 Rose de Franc amethyst side stones are well colored in pink, clear eye-clean and sparkly measuring 6mm x 2mm each. Setting is Solid 10kt Gold setting that measures Size 7 Overall there is only very light wear on this a very well cared for pre-owned piece. Stamped 10k “EFF(possibly Y)” EF or EFFY collection - see enlarged picture of stamp. This may be a vintage EFFY or EF Collection designer ring. Certainly is up to the same quality, size, and style of an designer piece. In fact this is the most fiery opal I have ever come across. Comes professionally cleaned. Questions? Leave a comment below!