"To make sure your jewellery is properly covered by your home insurance, you should get it accurately valued first. Usually, if it's under £1,000 it's covered by your home insurance policy. But if it's valued over £1,000 you'll need to list it as a high value item. If it exceeds your insurer's single item limit, you'll need to get a specialist jewellery policy.
Having your jewellery valued by a professional means you can get the right amount of cover. If your jewellery is under-valued, you might find you won't be able to claim the full amount needed to repair or replace it."