Dense Crystalline Graphite

Dense crystalline graphite is also called massive graphite. Such graphite crystals are clearly visible to the naked eye. The particle diameter is greater than 0.1 mm, the specific surface area is concentrated in the range of 0.1-1m/g, and the crystal arrangement is disorderly and presents a dense block structure.

This kind of graphite is characterized by a high grade, generally the carbon content is 60-65%, sometimes 80-98%, but its plasticity and smoothness are not as good as flake graphite.

Lump graphite is the rarest and most valuable graphite mine, mainly found in Sri Lanka.