Hi,
I am currently working in the pharmacy that is why I also wanted to own matching jewellery.
As a chain, I purchased the following from Amazon
https://www.amazon.de/dp/B06XP91VYC?ref=ppx_pop_mob_ap_share
and used the following tool for assembling
https://www.amazon.de/dp/B08H528HCX?ref=ppx_pop_mob_ap_share
When you want to print my other models in line with the current:
Jewelry stand (statue):
https://makerworld.com/en/models/498512#profileId-413112
Serotonin chain:
https://makerworld.com/en/models/513514#profileId-429612
Gift box for chain:
https://makerworld.com/en/models/513520#profileId-429618
Happy printing!