I have an appraisal for both of the items that are getting scheduled. Had to get one done for the diamond cocktail ring since it didn't come with any papers. Got a full report on everything and insurance thought it was great. Still had the appraisal for my ering/wedding bands.
The insurance company told me two things; if you don't have the receipt, then you must have an appraisal, and also that if the item is worth over a certain amount it must be insured separately. They also advised me to get photos of me wearing all my jewellery.