A collection of gem-set rings

A collection of gem-set rings
1st: 1977, The oval lapis lazuli cabochon within a 9 carat yellow gold wirework mount with bead detail, 2nd: 1982, The 11.0mm x 14.0mm cultured pearl of grey tint within a textured 18 carat bicoloured gold setting of organic openwork form, 3rd: 1992, The 8.0mm cultured pearl of grey tint in a textured 18 carat yellow gold setting of abstract crossover design, 4th: 1973, The agate crystal within a 9 carat yellow gold wirework surround with foliate detail, to a trifurcated band, all with UK hallmarks, ring sizes: 1st approx. L, 2nd approx. M (leading edge), 3rd approx. K, 4th approx. L (4)