Art Deco 9ct Gold Ring with Tourmaline Cluster

An Art Deco 9ct Yellow Gold and Tourmaline Cluster ring with 2 small diamonds in White Gold (10K) claws.  Hallmarked “10K” also has “417”. followed by “G” within a “shield. There is also a string of very tiny Hallmarks immediately to the right of the “10K. A stunning design. Dimensions approx.: finger size “Q”  or  “ 8 ¼”; Band generally 1mm wide to 3mm at shoulders x 1mm thick; Cluster 2cm across x 1.4cm wide. U.K. / European origin.