, of shaped rectangular form, centred by a principal old round brilliant cut diamond in diamond foliate cluster, to a four-row emerald line ground, channel set with square cut stones, outer line border of single cut diamonds, millegrain set in platinum, signed 'JEC & Co', serial number possibly Z8072, the principal diamond approximately 1.25ctLength 5.3cm / 2 1/8''
Width 1.7cm / 5/8''
Central diamond approximately 6.9 x 6.7 x 4.25mmWeight: 13g
Late 18th century cushion cut diamond five petal flowerhead brooch, c.1790, centred by a principal slightly hexagonal old cut diamond in border of smaller cushion cuts,
Late 19th / early 20th century sapphire and diamond cluster pansy brooch, 1900, centred by a cushion cut diamond of approximately 1.50ct, each petal pave set with cushion cut sapphires,