An 18ct. gold, tiger's eye quartz and diamond ring, by Alan Martin Gard

An 18ct. gold, tiger's eye quartz and diamond ring, by Alan Martin Gard
The oval cabochon tiger's eye quartz within a pierced, abstract design surround with brilliant-cut diamond accents, to a bark textured hoop, hallmarked London, 1970, finger size L½
The hoop with maker's mark AMG