Graphite natural flakes

Natural graphite is a metal. The layers are stacked together via van der Waals interactions and can be exfoliated into thin 2D layers.

The natural crystals have a typical shape of ~0.1 cm, and have a metallic appearance. 

Crystal size ~1 mm
Electrical properties Metal
Crystal structure Hexagonal
Unit cell parameters a = b =0.246, c = 0.667 nm, α = β = 90°, γ =120°
Type Natural