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diamonds

Monash University Professor Andrew Tomkins (left) and Royal Melbourne Institute of Technology (RMIT) Ph.D. scholar Alan Salek examine a ureilite meteorite sample at the RMIT Microscopy and Microanalysis Facility.
Posted inNews

Rare Meteorites Shed Light on Diamond Formation

Katherine Kornei, Science Writer by Katherine Kornei 18 October 202218 October 2022

By studying meteorites believed to be remnants of the catastrophic breakup of a dwarf planet, researchers are learning how lonsdaleite, a particularly hard type of diamond, forms in nature.

Image of the diamond from Botswana containing davemaoite as an inclusion
Posted inNews

Diamond Discovery Unearths Secrets of the Deep

by Clarissa Wright 23 December 20219 May 2023

A diamond inclusion has revealed a new mineral, davemaoite, as well as hints about the workings of our planet’s interior.

Wearing a white lab coat, Yiming Zhang, a doctoral student at the University of California, Berkeley, sits in front of a computer screen, examining data, with a mouse in his right hand. To his left, a gray microscope with four copper-colored rings encircling the stage perches on a black table.
Posted inNews

Diamonds Are a Paleomagnetist’s Best Friend

by Alka Tripathy-Lang 19 October 202114 March 2023

Typical paleomagnetic measurements average a sample’s signal. The quantum diamond microscope helps scientists make micrometer-scale maps of magnetism, showing where a sample locked in its magnetic signatures.

Figure showing a thermal model of a subduction zone with the relatively cold (blue) oceanic plate sinking into the comparatively hot (red) mantle.
Posted inEditors' Highlights

Diamonds Are at Fault

by V. Salters 26 May 202122 September 2022

Deep-seated earthquakes in subduction zones are related to diamond formation.

The rough Cullinan Diamond
Posted inResearch Spotlights

Explaining the Genesis of Superdeep Diamonds

by Terri Cook 12 March 201923 December 2021

Real-time tracking during diamond anvil cell experiments indicates reaction rates may control the unusual depth distribution of the extremely rare diamonds that form deep within Earth’s mantle.

Posted inEditors' Highlights

Are Diamonds Ubiquitous Beneath Old Stable Continents?

by Sergei Lebedev 7 August 20182 March 2023

Although rare at the Earth’s surface, diamonds may be commonplace at depths of 120 to 150 kilometers below the surface within the lithosphere of old continents.

A rough, uncut diamond sitting in kimberlite rock.
Posted inNews

Diamond Impurities Reveal Water Deep Within the Mantle

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 2 April 201823 December 2021

A high-pressure form of ice, trapped within diamonds forged in the lower mantle, suggests that aqueous fluids reside deeper in Earth than we knew.

The interior structure of Neptune
Posted inNews

Diamonds Really Do Rain on Neptune, Experiments Conclude

Kimberly M. S. Cartier, News Writing and Production Intern for Eos.org by Kimberly M. S. Cartier 15 September 201723 December 2021

Researchers subjected hydrocarbon samples in a laboratory to Neptune-like pressures. The samples, reminiscent of molecules found in the ice giant’s atmosphere, compressed into nanodiamonds.

Researchers scrutinized ultrathin slices of diamond from the Orapa Mine in Botswana pictured here.
Posted inNews

Mineral Flaws Clarify How Diamonds Form

Amy Coombs by A. Coombs 23 June 201625 March 2022

A study of nanoscale, iron- and sulfur-rich impurities in diamonds provides new clues to the chemical processes that produce the superhard crystals and at what depths they occur.

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