kosztowności in English:

This safe is for keeping valuables.

I'd like to put my valuables in a safe deposit box, if any are available.

Put your valuables in the safe.

You should keep your valuables in a safe place.

She kept her valuables in the bank for safety.

I'd like to check some of my valuables.

Please check your valuables at the front desk.

Will you keep my valuables for me, please?

I want to recover my valuables.

Could you hold these valuables?

The valuables are in the safekeeping of the bank.

Can I deposit valuables here?

it's safer to put valuables in our safe

What is the best place to hide your valuables?

My jacket has a secret pocket where I can hide money or other valuables.