Some graphite is found in igneous rocks and also as nodules inside of iron meteorites. Color is black silver. Luster is metallic to dull. Crystal Habits include massive lamellar veins and earthy masses. Cleavage is perfect in one direction.
Fracture is flaky.
Streak is black gray to brownish gray. Associated Minerals include quartz , calcite , micas , iron meteorites and tourmalines . Best Field Indicator is softness, luster, density and streak.