What would the best combo be for figuring out how to get this (even if it happens not to be in), if you play solo?

I was part of a group that got it once but I can't remember what was involved except:
- I think we had to go to a different area first and then hurry?
- I think there were lots of agro mobs in the manor that you had to enter
- I think there was some kind of trap on the container?

Also can you voluntarily remove stone form without killing yourself or destroying it?

Normally I took things like this in pk but you can't do that with this item!