Two opal set signet rings. Both 9ct yellow gold, one presented as a classic oval shaped signet featuring a central low cabochon piece of solid white opal, measuring approximately 14.2 x 11.5 mm, bezel set in an open backed mount, merging to smooth shoulders and band, the second ring of square shape, featuring a painted back solid piece of opal, strong blue and green spectral colours throughout, the flat polished piece, open to reverse, merging to shaped tapering shoulders and band. N.B. Opal as found.