Image Credit

Description:

Graphite (left) is made of carbon that is arranged in sheets, which can shift easily with respect to one another. A visualization of how the carbon building blocks (represented by tiny black spheres) are arranged to form a sheet is shown on the left

Source:

wpclipart.com

License:

Public domain

Source URL:

http://www.wpclipart.com/rocks_minerals/G/Gr_Gy/Graphite.png.html