A Homeowner's insurance policy and Apartment Tenants policies commonly include coverage for personal property and the value of jewelry is included in said limit of insurance. All such policies restrict jewelry coverage for theft, burglary or robbery, however, to $500 in the aggregate ( Some few companies provide $1000 ). Further, such insurance is usually for perils of fire, wind, building collapse, theft, vandalism, etc. and not for "all risks" including loss of the property or loss of a single stone from the item. To obtain complete coverage to the full value of item(s), and appraisal for each piece will be required and the coverage can be scheduled on your policy, with a specific description of the item and an amount of insurance on each item. If you care to have proper value coverage, a detailed professional appraisal is paramount.