An Australian tourmaline and diamond cluster ring, by Jan Logan, with a cabochon pink tourmaline with a stated weight of 25.45ct. The pink tourmaline rub set to a plain collet, with a border of brilliant cut diamonds, grain set to a pierced back plate, mounted to the top of a 'D' section shank. Marked 750, maker's mark. A Jan Logan ring case. Head 23.50 x 21.60mm, 12.12g. Finger size O Condition report: Surface reaching inclusion to the tourmaline. Gemstones bright and lively. Diamonds bright and lively. Light surface marks commensurate with its age.