Jewellery, Watches and Objects of Vertu to include the personal archive of Louis Osman, goldsmith and architect

A diamond and onyx necklace, by Nicola Appleby, the circular onyx pendant applied with a collet set brilliant-cut diamond with gold tail, collet set and sliding mounted, between two similarly mounted circular textured panels, on a snake-link chain, hallmarked for 18ct gold and bearing maker’s mark, onyx pendant diameter 17mm. £300-500

Nicola Appleby trained at the Sir John Cass College, London and now specializes in producing pieces influenced by the natural environment. She often uses flowing lines and organic forms as opposed to more structured architectural shapes and is fascinated by different textures, enjoying the contrast produced by combining high polish and texture on gold. She was a finalist in the De Beers Diamonds International Awards 1992 and also a finalist in both the Gold Virtuosi 2000 and Gold Virtuosi 2002, the World Gold Council's international gold jewellery design competitions.