What makes diamonds blue?

[Still Waters]

Blue diamonds—like the world-famous Hope Diamond at the National Museum of Natural History—formed up to four times deeper in the Earth's mantle than most other diamonds, according to new work published on the cover of Nature.

"These so-called type IIb diamonds are tremendously valuable, making them hard to get access to for scientific research purposes," explained lead author Evan Smith of the Gemological Institute of America, adding, "and it is very rare to find one that contains inclusions, which are tiny mineral crystals trapped inside the diamond."

Inclusions are remnants of the minerals from the rock in which the diamond crystallized and can tell scientists about the conditions under which it formed.

https://phys.org/news/2018-08-diamonds-blue-boron-oceanic-crustal.html

[Kittens Are Jerks]

I love blue diamonds. Knowing now what makes them so valuable makes me want them even more.

[NightScreams]

Contaminated, un-pure carbon?...pffff….I snub my nose.

[SHaYap]

Ms Monroe made more diamonds blue than any deep Earth mantle ever did

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