The mineralogy and chemical compositions of inclusions in diamonds are the primary source of information about the environment in which...

The discovery of diamonds in metamorphic rocks of continental affinities occurred shortly after the discovery of coesite in similar...

Monocrystalline diamonds are the most valuable diamond type, economically. However, there are other varieties of diamond forged in...

Since first being discovered in India over 2000 years ago, the most striking and universally recognized shape of an uncut diamond is the...

This chapter covers both primary and secondary diamond deposits because both have played an important role in the science of diamond...

In October 2020, a flawless D-colour 102 carat diamond sold for $15.7 million US (read more here). Diamonds like this make headlines from...

Diamond, clearly, is synonymous with the gemological trade but in the last 20 years of material science research, diamond is now firmly...

Quartz conglomerates from Nunavut in northern Canada (near the Coronation Gulf) are one part of the puzzle to figure out when and how the...

We know that subduction is the key way to get carbon into the diamond-forming regions of the deep Earth. But which rocks in the...

Trigons on a diamond from the Fort a la Corne deposit in Saskatchewan, Canada. Image by Janina Czas / University of Alberta. Trigons are...

Siberia has among the highest grade diamond mines in the world. But did you know that we had two women to thank for their discovery? The...

Nitrogen is the most common trace element in both natural and laboratory-grown diamonds, and the number and nature of the...

Kimberlites are complex volcanic eruptions that have ferociously traversed more than a hundred kilometers of rock from source to surface....

Diamonds are comprised mostly of carbon. Any other elements present in the diamond are normally at incredibly low abundances that are...

Diamonds are the most amazing of gems. Just as amazing, however, is how natural diamonds reach Earth’s surface. Diamonds are formed 150...

This is a sulphide mineral inclusion trapped in a diamond from Ellendale (Australia). The sulphides were broken out of the diamonds,...

Diamond geologists now have evidence for a wide range of diamond source fluid compositions, including carbonate-bearing fluids,...

Ringwoodite is the high-pressure form of the mineral olivine (Mg2SiO4) that occurs between 520 and 660 km below the surface of the earth...

Colourless olivine inclusion in a natural rough octahedral diamond. Image by Stefano Castelli (University of Padova). Natural diamonds...

Image of a garnet mineral inclusion in diamond by Anetta Banas (University of Alberta). Natural diamonds are rare. Where should diamond...