It has a black streak on glazed porcelain. Graphite is an excellent conductor of heat and electricity and has a high melting temperature of 3,500 degrees Celcius. It is extremely resistant to acid, chemically inert, and highly refractory. Amorphous graphite is a microcrystalline graphite formed by crystallization of the carbon from organic sediments. Production in Canada Graphite deposits of potentially commercial interest in Canada principally occur in rocks of the province of Grenville in Eastern Canada.
China is the most important producer of graphite in the world.
Other producing countries are Ukraine, Brazil, India, North Korea and Republic of Korea, and Mexico. The principal use for graphite is in the manufacturing of refractory products. This is followed by foundries, lubricants, brake linings, crucibles, and pencils. In spite of our best efforts, the above list may not include all graphite producing companies in Canada.