Why is cubic zirconia not a mineral, but a diamond is? They look a lot alike. (asap this test is timed)

The second law of thermodynamics says that processes that involve the transfer or conversation of heat energy are irreversible. The second law also states that there is a natural tendency of any isolated system to degenerate into a more disordered state. One thing the second law explains is that it is impossible to convert hear energy to mechanical energy with 100 percent efficiency.