This Tiny Diamond Contains a Mineral That's Never Been Seen Before

The discovered mineral — called calcium silicate perovskite (CaSiO3)— was found trapped inside a diamond excavated from South Africa's Cullinan mine (most famous for yielding the world's largest diamond in 1905, part of which now adorns the crown jewels of the United Kingdom).The finding, published online today (March 7) in the journal Nature, provides an important clue to the puzzle of how Earth's inner structure behaves.While rare to human eyes, calcium silicate perovskite may be s