What do you get...

Mineral Matters #453

…when you cross a tourmaline with a diamond?

Maruyamaite!

Maruyamaite, approved as a new mineral in 2013, with a formula of K(Al₂Mg)(Al₅Mg)(Si₆O₁₈)(BO₃)₃(OH)₃O, is a pale brown to brown, K-dominant tourmaline found in high-pressure rocks. A recent study in the European Journal of Mineralogy has reported the discovery of microdiamond inclusions in maruyamaite from the Kumdy-Kol microdiamond deposit, Kokchetav Massif, Kazakhstan!

Interesting read!

You can read the article: Crystal chemistry of K-tourmalines from the Kumdy-Kol microdiamond deposit, Kokchetav Massif, Kazakhstan, by Beatrice Celata, Ferdinando Bosi, Kira A. Musiyachenko, Andrey V. Korsakov, and Giovanni B. Andreozzi, here.

Below: My kind of microdiamonds, these ones from Kimberley, South Africa. Width of view 8mm.