Talk:Opal Dragon/@comment-210.195.96.117-20121001171112/@comment-210.195.96.117-20121001173155

Me again. " The silica itself is formed either by volcanic origin or by deep weathering of Cretaceous clay sediments producing both silica and white kaolin often seen associated with the Australian opal fields" so water, earth & fire (water x lava)? Or water, earth, air (water x sandstorm)