Initially, it may seem extremely daunting to be sitting in front of several thousand carats of
small diamonds, knowing that the likelihood of finding a diamond with a meaningful …

Earth's carbon, derived from planetesimals in the 1 AU region during accretion of the Solar
System, still retains similarities to carbon found in meteorites (Marty et al. 2013) even after …

Most diamonds are metasomatic minerals, which means they grew from fluids or melts that
moved through solid mantle rocks and chemically interacted with them. The involvement of …

Geothermobarometric calculations for a worldwide database of inclusions in diamond
indicate that formation of the dominant harzburgitic diamond association occurred …

Redox melting refers to any process by which melt is generated by the contact of a rock with
a fluid or melt with a contrasting oxidation state. It was originally applied to melting owing to …

Kimberlite-borne xenolithic eclogites, typically occurring in or near cratons, have long been
recognized as remnants of Precambrian subducted oceanic crust that have undergone …

There is a growing body of evidence for the origin of cratonic mantle eclogite xenoliths by
low-pressure formation in now-recycled ocean floors. Because they have protoliths …

Thermodynamic parameters have been calibrated for a geobarometer suitable for use on
eclogitic mantle xenoliths. The barometer is based on the incorporation of tetrahedrally …

Cratonic eclogite is the product of oceanic crust subduction into the subcontinental
lithospheric mantle, and it also is a fertile diamond source rock. In contrast to matrix minerals …

Newly recognized occurrences of ultrahigh-pressure (UHP) minerals including diamonds in
ultrahigh-temperature (UHT) felsic granulites of orogenic belts, in chromitites associated with …