In Beta Build 1 the Diorite, Andesite and Granite, in Survival mode can not be picked up as themselves, but turn into regular cobblestone when mined.
In Beta Build 1 the Diorite, Andesite and Granite, in Survival mode can not be picked up as themselves, but turn into regular cobblestone when mined.
This issue has been reported already. It has been linked to the original bugreport.
Please search before reporting any bugs, as it's likely that one exists already.