From random stones, for the normal mines, there is a 2.9% chance to get copper on on floors 2-39, or gold ore on floors 81-119; and on floors 41-79, there is a 15% chance to get ice crytals and a 2.465% chance to get iron ore. | From random stones, for the normal mines, there is a 2.9% chance to get copper on on floors 2-39, or gold ore on floors 81-119; and on floors 41-79, there is a 15% chance to get ice crytals and a 2.465% chance to get iron ore. |