> it proves effort has been spent Diamonds only prove that in a very narrow sense, namely in that some gemstone expert (that you need to trust) can subject the

> it proves effort has been spent Diamonds only prove that in a very narrow sense, namely in that some gemstone expert (that you need to trust) can subject the diamond to a battery of sophisticated tests in order to testify to its genuine, non-counterfeit nature. Bitcoin's Proof of Work is trivially verifiable in comparison.