Two cultured pearl and diamond pedants and a diamond-set brooch pendant

Two cultured pearl and diamond pedants and a diamond-set brooch pendant, one black cultured pearl measures 9.8mm and suspending from a diamond trefoil-set pendant loop, the other lighter black cultured pearl measures 11.3mm and suspending from a rubover-set round brilliant-cut diamond, with a twisted knot-shape pendant set with round brilliant-cut diamonds