from THE BOGO
Let's Have Fun
The rings and earrings bought with us can be shipped via EMS PREMIUM (UPS).
And for DHL
It clarifies that they don't transport 'precious metal, jewellery, gemstones, ...'
https://send.dhlparcel.co.uk/parcel-delivery/uk-prohibited-items And this is the link you got from DHL UK after you messaged them.
And the reply we got from DHL KOREA was "If it contains gold, you can't ship it. Silver, Okay."
And on the other hand, we found that many jewelry companies ship worldwide using DHL. ex: https://www.instagram.com/marcmirren/ (Sweden) Noonoofingers (Korea) etc.
For us, we've shipped lots of earrings and rings since a few years to various countries thru ems. But we haven't used DHL for jewelry yet.