Amazing modernist geometric brooch by John Donald, London, 1969, crafted in solid 18K yellow gold with textured finish. Set with 8 four-prong European round diamonds (1.35 ct, F color, VS clarity) and 2 cushion-cut blue sapphires (0.42 ct). Measures 54 x 32 mm (2.13 x 1.26 in), weighing 16.4 grams. Fitted with concealed hinge pin and trombone security lock. A highly collectible statement piece. Very good conditions. All our diamonds and colored gemstones are naturally earth-mined. Any synthetic (lab-grown) stones will be clearly indicated in the description. Upon Request, Auction House may provide an appraisal. This will carry an additional cost. Appraisals are made by our in house GIA certified Gemologist.