I have had my 14k gold diamond engagement ring for 6 years and recently decided I may want to have it coated in Platinum. I have changed to mostly silver jewelery in recent years and I know platinum has a reputation of being very durable. I have no idea if this is a good idea or if it can even be done. I also wonder how shiny platimun would be or if a sterling silver plating may be better. PLEASE HELP!