As a rule of thumb, having your jewelry appraised every five years is perfect adequate unless your insurance company requires it be done more often. It’s never a bad idea to stay aware of the changing market. If you see that gold or platinum prices are making volatile jumps, contact your jewelry appraiser and ask if your jewelry appraisal should be updated. The same holds true with diamonds or gemstones. The Insurance Institute of America recommends that you have your jewelry appraisal updated every 2 years. If you are insuring your jewelry you will want to check your specific insurance policy to find out how often they require appraisals. It is unlikely they will provide you an appraisal reminder so you will need to keep track yourself.