Do you know why it is Not able to trade, I know there used to be a valid reason but I believe there isn't one now since you have to be trusted on a island
If you're referring to the block that looks like smoothstone but spawns a silverfish when clicked on, then Lemonade is spot on. Legal to own, illegal to trade
The theory is that u could kill someone with it and take their items, if u can spawn a silverfish with it.
If you arnt trusted on the island, then you cant place blocks. This would only be possible on your own island.
Yes, although that would be quite silly since they're pretty rare. On other people's island you could be /trust'ed
If you have one don't place it because you can't pick it up again (just turns into regular stone even with silk touch). I learned that the hard way.
Since you question has been answered, I'll lock and archive this. Feel free to make a suggestion or discussion thread about the legality of the egg.
Thread Locked due to issue being resolved. If you disagree to this action, please report this post, and a moderator or administrator will reconsider it. Kind regards, The Staff