[Rockhounds] Super-deep diamond provides first evidence in nature of Earth's fourth most abundant mineral

[Earl R. Verbeek]

Compositionally it's equivalent to wollastonite.

              Cheers-   Earl

-----Original Message-----
From: Rockhounds [mailto:rockhounds-bounces at rockhounds.drizzle.com] On Behalf Of Peter Richards
Sent: Thursday, March 8, 2018 10:59 AM
To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors <rockhounds at rockhounds.drizzle.com>
Subject: Re: [Rockhounds] Super-deep diamond provides first evidence in nature of Earth's fourth most abundant mineral

Presumably, yes, it would morph into a form that’s stable at Earth surface conditions - a different mineral.  As long as it’s contained by the diamond, it is still exposed to the high pressures at which it’s stable.

Pete Richards
___________________________
R. Peter Richards, Ph.D.
rpr at heidelberg.edu
Morphological Crystallographer

> On Mar 8, 2018, at 10:41 AM, Tim Fisher <nospam at orerockon.com> wrote:
> 
> Very cool!
> 
> Tim Fisher
> Orerockon.com
> 
> 
> 
> 
> -----Original Message-----
> From: Rockhounds [mailto:rockhounds-bounces at rockhounds.drizzle.com] On 
> Behalf Of Kreigh Tomaszewski
> Sent: Thursday, March 08, 2018 6:29 AM
> To: Rockhounds at drizzle.com: A mailing list for rock and gem collectors
> Subject: [Rockhounds] Super-deep diamond provides first evidence in 
> nature of Earth's fourth most abundant mineral
> 
> For the first time, scientists have found Earth's fourth most abundant mineral—calcium silicate perovskite—at Earth's surface.
> 
> "Nobody has ever managed to keep this mineral stable at the Earth's surface," said Graham Pearson, a professor in the University of Alberta's Department of Earth and Atmospheric Sciences and Canada Excellence Research Chair Laureate. He explained the mineral is found deep inside Earth's mantle, at 700 kilometres.
> 
> 
> 
> Read more at:
> https://phys.org/news/2018-03-super-deep-diamond-evidence-nature-earth
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