A green tourmaline and diamond pendant, set with a mixed step-cut green tourmaline weighing

A green tourmaline and diamond pendant, set with a mixed step-cut green tourmaline weighing approximately 30.00 carats, to a border and surmount of brilliant-cut and tapered baguette diamonds, on a fine link chain, mounted in white gold, pendant length 4.2cm, pendant stamped UCG 14K 585, chain length 66cm, chain with British hallmarks for 9ct gold, case and facsimile of valuation document