[suddenlybananas]

https://www.smithsonianmag.com/smart-news/a-3000-year-old-br...

>The ministry found that the artifact had passed from a museum restoration specialist to a silver trader to the owner of a jewelry workshop.

[sct202]

https://www.bbc.com/news/articles/cpegg27g74do

>British Museum gems for sale on eBay - how a theft was exposed

The British Museum is also vulnerable to staff theft.