There is only one rather safe way to travel with jewelry: Wear it!

I am not kidding you. It is way too easy for TSA to swipe a little baggie that contains obviously jewelry. First they see it on the x-ray, then they tell you that they need to rescan your bag for whatever and carry it out of your sight, you being already behind the metal detector. Putting it in checked luggage is obviously a total no-no.

I have had a nice watch stolen myself in FRA about 15 years ago from a checked bag.

If you wear it daily, wear it also for the flight. If you bring and extra watch, you have a second hand to put it on (at least I hope so ). An extra necklace goes around the neck. All rings on your fingers. Earrings in ears. An extra pair of earrings or an odd ring can go in your wallets coin purse where they will stay with you.

Unless you are wearing a massive gold anchor chain the metal detector will not alarm. Watches you might have to take off.

If you are afraid of looking a bit strange just wear the pieces under a sweater.

If you still want to look for jewelry cases and etuis there are dozens on amazon but I'd really, really recommend against separating yourself from your valuable belongings. You are the judge of how much you can afford to lose and whether you want the insurance and police report trouble on top of the grief.

Till