I'm not sure if this is a bug but, according to https://en.uesp.net/wiki/Daggerfall:The_Ransom, I could drop or sell the gem given by the Merchant/Innkeeper.
And by doing that,
But, the gem given by the employer is quest tagged, making it impossible to drop/sell the gem.
Is this intended?
P.S.: If you Quickload the game repeatedly, Daggerfall Unity would gradually uses more RAM each time, resulting in having more laggy loading time, including opening Inventory. Done that when I'm trying to get 6 Attribute Points during leveling up.