In Reply to: gold jewellery posted by michelle on Saturday, 13. September 2008 at 19:13 Bali Time:
Answer - no-one!
Dodgy stuff with gold is as old as history. Archimedes built his reputation on discovering fraud with gold jewellery (in Ancient Greece!!!)
Frankly I wouldn't trust my closest friend with remelting and manufacturing gold jewellery. If you have an understanding of Physics, and relative densities - then go for it - otherwise - have it done in Australia where the necessary assaying can be done for you by independent authorities!