A diamond tiara/necklace and earrings

A diamond tiara/necklace and earrings, late 19th/early 20th century, the tiara designed as a series of graduated palmettes and pointed trefoils flanked by knife wire scrolls, set with cushion-shaped, circular- and rose-cut diamonds, mounted in silver on gold, the tiara frame of base metal, detaching to form a necklace via additional back chain composed of knife wire links connected by cushion-shaped diamonds in box settings, inner curve of tiara frame 25cm, tiara height at centre 3.5cm including frame, length as necklace 39cm; together with a pair of later pendent earrings of matching palmette design, set with circular-cut and cushion-shaped diamonds, length 2.5cm, screw fittings, fitted case