Φ Φ ALAN MARTIN GARD, A DIOPTASE AND DIAMOND BROOCH, C1972

Φ ALAN MARTIN GARD, A DIOPTASE AND DIAMOND BROOCH, C1972, set with a dioptase crystal within a textured openwork 18ct yellow gold surround, set with round brilliant-cut diamonds, maker's mark AMG, with London hallmarks for 1972, width approximately 6.5cm,