Thank you for viewing. This is an opal-style ring from MAQUALAY (Macole), a popular jewelry brand in the Showa era. It has a beautiful design with iridescent brilliance floating within a soft white color. The classical filigree setting is also characteristic, giving it an elegant atmosphere typical of Macole. It has been appraised by the Japan-Germany Gemological Laboratory, and the main stone was identified as "imitation stone (oval cabochon cut)." The actual appearance is very beautiful, and you can enjoy the play-of-color like a natural opal. Appraisal: Japan-Germany Gemological Laboratory No. J-154090 Main Stone: Imitation stone (oval cabochon cut) Size: No. 15.5, approx. 10.80 x 9.13 x 5.29mm Metal: SILVER stamped (see photo) Brand: MAQUALAY (Macole) Condition: There is some dullness due to aging, but it is in overall good vintage condition. It will be sent with a sorting bag, placed in a new jewelry box, and carefully packaged. Recommended for those looking for Showa retro jewelry or a Macole collection.