What is the specific heat capacity of the specimen?

A precious-stone dealer wishes to find the specific heat capacity of a 0.040-kg gemstone. The specimen is heated to 95.0�C and then placed in a 0.13-kg copper vessel that contains 0.072 kg of water at equilibrium at 25.0�C. The loss of heat to the external environment is negligible. When equilibrium is established, the temperature is 31.0�C.