Graphite has a price that fluctuates much like metals according to available supplies. It is not mined in the US and its requirements in that respect are entirely imported, mostly from China. The average cost of graphite is $0.50 per gram. It is an electrical conductor and a semi-metal. It is useful in a wide range of applications such as arc lamp electrodes. It is the most stable form of carbon under standard conditions. Graphite and graphite powder have industrial uses for their self-lubricating and dry lubricating properties. Natural and crystalline graphite are not often used in pure form as structural materials, due to their brittleness and inconsistent mechanical properties.