A COLLECTION OF GEM-SET JEWELLERY, To include a 9ct gold necklace, set with rectangular-cut green tourmalines on interlocking pendants, on a wheat chain, maker's mark, UK hallmark, length 37.2cm; a three-stone diopside ring, maker's mark, stamped '375', size O; together with a three-rows of rectangular-cut diopside ring, maker's mark, UK hallmark, size M½; total gross weight approx. 15.1 grams (3)