Summary:

- The article reports the discovery of a new mineral named "davemaoite" in a diamond from the Earth's lower mantle. Davemaoite is a high-pressure calcium silicate perovskite that provides insights into the composition and structure of the deep Earth.

- Davemaoite is the first new mineral found in a natural diamond, and its discovery suggests that diamonds can act as "time capsules" preserving information about the deep Earth's interior. The mineral's composition and structure reveal details about the temperature, pressure, and chemical conditions in the lower mantle.

- The findings demonstrate the value of studying diamonds as a window into the inaccessible depths of the Earth, and highlight the potential for future discoveries of new minerals and materials that can expand our understanding of the planet's interior.