Documentation is key
This might be one of those things that doesn’t immediately spring to mind in the way that ‘pack your passport’ does, but preparing proper documentation is pretty important. If you haven’t done so already, take photos of your jewellery before you go away.
This will help with identification if it’s lost or stolen and you’ll be able to see if any damage occurs. Also make sure to keep copies of receipts, appraisals and any certificates of authenticity.