The largest diamond ever found was a carbonado from Brazil ... when intense heat and pressure transformed carbon into diamonds, which volcanic eruptions then lofted to the surface.

Diamonds in Botswana are found in volcanic features called kimberlite pipes. These carrot-shaped structures brought rocks ...

"He found that yellow diamond he was looking for ... and search for their own diamond and take that home in its original volcanic source," Cox said. "Different things and different levels of ...