In the [Mining] FAQ it states that you need a UOSA enabled account, and read the book Mining for Gems, in order to get the normal gems. What about Crystalline blackrock? The FAQ doesn't mention whether you also need a UOSA account to mine it. Nevermind, I found my answer finally. You only get it in Ter Mur thus, only SA enabled accounts can dig it up. Guess I have to upgrade another account.