Jo Malone budget can buy a nice 916 gold pendant or some earrings. More valuable (and retains value better than perfume) especially if she normally do not use perfume/cologne.

Just go to the various goldsmiths, look for the style you like (or you know she likes). There are some designer pieces but not sure about pricing of those nowadays. Anyway one walk around the mall's goldsmiths should get you up to speed. There was once they sell the RM500 gold coin thing (very small coin) with a mickey mouse doll (disney collection), also works as a gift and NO ONE throws away gold.