Tiberium

My sim in the Science career got an opportunity to collect some tiberium and take it to work. The task is called "What is this ... Tiberium?" This is a gemstone found in Al Simhara. My sim successfully collected one and one spare and brought them back, but now I have been reading online that it can be poisonous if kept in the inventory, grows if placed on the lot ... 

What happens if it is stored in a chest? Is the poisoning and growing true? Should my sim get rid of the spare?

The description on it when hovering over it says something about the 'potentially dangerous side effects', however my sim who carried it home didn't experience anything or any moodlet from it.