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Jordi Lluis Justo del Campo February 22, 2012 07:48PM

Alumino-ferrobarroisite is an hypothetical Amphibole species: name and ideal formula approved by the IMA, but has not been found in nature yet.

How is it possible that IMA approved a mineral that not exists in nature?
If I'm not wrong anyone by this rule may file a new mineral?
Reiner Mielke February 22, 2012 08:25PM
Now that is what I call being proactive.
Uwe Kolitsch February 23, 2012 07:17PM
You might want to read (IMA Report), (IMA Report) and (Discussion paper initiated by the IMA-CNMNC).
and then argue with the respective authors.
Jordi Lluis Justo del Campo February 23, 2012 09:32PM
That might have scientific and technical reasons, but they are understandable to me as a profane public.
Stefan Schorn March 05, 2012 06:49PM
Or maybe read this report where the name was published
Canadian Mineralogist 35 (1997)
Bela Feher March 06, 2012 11:47AM
Or see the earlier discussion in similar topic:,14,112462,112462#msg-112462
Bart Cannon March 06, 2012 02:32PM
I am very interested in ferrobaroissite.

Skagit County of Washington State has a cluster of Jurassic eclogites and ferrobarrosite is common in some portions of that eclogite.

My EDS analyses show important aluminum in the ferrobarrorisite.

Late stage veinlets in the ferrobarroisite schists show very attractive emerald green druses of what has tentatively been identified as omphacite. I think they look more like an amphibole rather than a pyroxene, but analyses at RUFF differ from my opinion.

I will provide this material free of charge to any competent lab. And ANYONE who wants a sliver of the purported ferrobarroistite schist may have a TN for $1.50 postage.

Most of the original work on this area was conducted by the geology staff at Western Washington State University. Ed Brown might have been the team leader.

See GSA "Geologic Map of the Northwest Cascades, Washington" Map and Chart Series MC-61. published by the GSA in 1987.

If anyone has a confirmed ferrobarroisite, I would very much like to obtain a small piece.

Reiner Mielke March 06, 2012 05:33PM
How much would it cost to positively identify an amphibole these days?
Bart Cannon March 06, 2012 09:24PM

The best analyses are free and conducted by interested specialists !

I can't compete on quality or cost at my lab.

D Mike Reinke March 07, 2012 12:05AM
I'm interested in a sliver or two. One for a friend of mine who isn't the amphibolic I am. (i'm not THAT much of one anyway, I won't probably get that deep into the chemistry of it.) How do I contact you other than here?

Reiner Mielke March 07, 2012 12:25AM
let me know how that works out for you.
Bart Cannon March 07, 2012 12:29PM
Anyone who wants a small piece of Skagit County ferrobarroisite schist can have one for the cost of postage.

Just put some stamps in an envelope.

The ferrobarrosite schist has to be one of the toughest rocks on Earth and it breaks with sharp edges..

If our early indians knew where the eclogites were out here, they would have had a top product for hammers, scrapers and spear points.

There is an excellent thesis at the University of Washington by the late Ed Baker. He determined that by as long ago as 9,000 bp there were five quarries in the Northwest from which came most of the toolmaking materials. The indians didn't just casually pick up tool making rough willy-nilly.

They insisted upon the very tough and workable vitrophyric dacites from specific locations between British Columbia and SE Washington State.

I needed to use a "Microblaster" to break up my ferrobarroisite schist boulder. A 4 pound sledge just makes the stuff laugh.

Bart Cannon
1041 NE 100th Street
Seattle, WA 98125
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