A mid 20th century platinum Sri Lankan colour-change sapphire and diamond bracelet. The rectangular-shape sapphire, with vari-cut diamond lugs, to the graduated brilliant-cut diamond line sides. With report 10140, dated 3rd May 2018, from Cisgem, stating Sri Lanka, no heat, colour-change, estimated dimensions 10.30 by 14.90 by 9.66mms. Estimated total diamond weight 7cts, principal diamonds estimated J-L colour, SI1-P1 clarity. Length 18cms. Weight 28.7gms.