Valuable Blocks?

[Cell]

Well, Last i recalled, This was one of the main topics in the Rule thread by Kubrick.
(Which Android or Yotta should post.)
I had a huge discussion with Kubrick about this, and he said that all valuable mineral blocks, such as Diamond, Iron, and Gold, can be broken and stolen.
He did say that was in the thread, but since that thread has yet to be published, and we are going by the game rules, i would suggest not to place them, just in case.