GJ Simandl, S Paradis, C Akam - … Ministry of Energy and Mines & …, 2015 - researchgate.net
Graphite is an opaque, gray-black, and soft (1-2 on Mohs hardness scale) mineral with a
metallic luster. It is characterized by a greasy feel, low density (2.09-2.23 g/cm3), high …