Graphite is commonly used as a writing material, lubricant, and electrodes. It commonly occurs on it's own in some metamorphic rocks and in igneous rocks as an associate of quartz, calcite, micas, and tourmaline.
Graphite is commonly used as a writing material, lubricant, and electrodes. It commonly occurs on it's own in some metamorphic rocks and in igneous rocks as an associate of quartz, calcite, micas, and tourmaline.