PETR JAN JURACKA / SCIENCE PHOTO LIBRARY PETR JAN JURACKA / SCIENCE PHOTO LIBRARY
Diamond in host rock. Close-up of a diamond (upper left) still embedded in its host rock. Diamond is an allotrope of carbon in which the carbon atoms share strong covalent bonds and are arranged into a cubic lattice. As a result, diamond is the hardest naturally occurring material known on the planet, and has been utilised in various tools for cutting, grinding, and polishing. This diamond measures 3mm across.
Model release not required. Property release not required.