Do a search on the internet on how to control lighting when shooting chromed or shiny metals. The American photographers are famous for doing this! They love Bling!
Some of the shots you see on Harley Davidson ads are a good reference. I don't have any materials at hand at the moment, but if you spend some time to do some research on the internet you should be able to find something.
Shiny objects are hard to shoot, and it requires quite a bit of work. I hope you can reshoot this and post your findings too. Cheers.