Paraiba-Type tourmaline and diamond ring, of cluster design, centring a collet-set oval Paraiba-type tourmaline weighing 20.82 carats, framed by an assymetrical undulating openwork surround pave-set with brilliant-cut diamonds, the diamonds together weighing approximately 7.50 carats, mounted in 18ct white gold, size N. Accompanied by a GIA report numbered 2357778331, dated 14 August 2020, stating that the 20.82 carat tourmaline is of greenish-blue colour.