When I need large stones, I'll first carve out a small piece to do a model, and only go to get the material when I'm sure it's usable, in order to avoid wasting the materials and destroying the environment.
如果需要大石頭時，我會先敲一小塊下來琢磨看看，真的能用才去採，免得萬一用不上，既糟蹋了石材，又破壞了環境。