Diamond, crystal in matrix - Stock Image - C001/4339 - Science Photo Library

Diamond, composed of pure carbon, is the hardest mineral known, and also the most popular gemstone. It occurs in a unique rock known as kimberlite that was created at great depths and high temperature and pressure. JOEL AREM/SCIENCE PHOTO LIBRARY

Diamond specimen - Stock Image - C013/6632 - Science Photo Library

Diamond in kimberlite - Stock Image - C020/0518 - Science Photo Library

Diamond in Kimberlite - Stock Image - E425/1168 - Science Photo Library

Natural Sharp Diamond on Matrix from Russia - Fine Art Minerals

Rough Diamond Crystal In Kimberlite Matrix.

Diamond Crystal on Matrix from Mirna Pipe, Republic of Sakha (Yakutia) — Astro Gallery of Gems

117 g Herkimer Diamonds in Calcite Matrix Specimen, Diamond Mountain

A Gorgeous Crystal Clear Herkimer Diamond on Matrix Piece is a perfect diamond and will need extra packaging for delicate shipping. Size: 104x51mm

1900’s NY Herkimer Diamond On Matrix Crystal Mineral Specimen Medium Cabinet

Diamond Crystals (natural diamonds)