FMF - Friends of Minerals Forum, discussion and message board

¡Eppur si muove!

Yes, sometimes, something important changes in the mineral world, in Spanish Natural History Museums, and in our natural heritage.
On the 21 of May the people of Vitoria-Gasteiz w ...

A (real) anecdote of Munich 2014:
I was with a friend, a good level mineral collector, and we were in a hidden corner at the show watching some Pakistanis and Afghan samples. My friend had an Afghan ...

The next?

Perhaps some significant amount of "normal" (?) collector will deduce to attend mineral shows is lost time and that it's the moment to left minerals aside.

Perhaps some miner ...

Accustomed to a relatively stable mineral marked last decades I’m astonished to the spiral increasing of prizes and now, I’m absolutely lost and out (I cannot understand anything). At Munich, past Oct ...

The bubbling mineral prizes is a rough reality.
From the point of view of the North-American dealers and buyers it can be just a question of buying and selling and it can be only a “take it or leave ...

I don't know if the book is on line (I suppose not).

Anhydrite, even considering it, genetically, a dehydrated form of gypsum, is a different species, with a very different structure (orthorhombic, ...

Very probably it is anhydrite. It has been cited, as inclusion, in some Swiss quartzes.
As example, you can see pages 140-142 of the book: Hyrsl, J., Niedermayr, G. 2003. Magic world: inclusions in q ...

could it be metallic?

Thanks to all, but this article would not exist without the great work of Tom Moore and Wendell Wilson.

See information about fluorapatite from Ontario and other similar apatite localities.
Quite sure it is fluorapatite.

This year I arrive one day later (on thursday). I travel waiting for gold (a wide offer, I presume) and specially for the "Gold" exhibition (a lot of expectations on it).

Novelties, class ...

...there's something wrong with that locality information: The famous locality of St. Andreasberg is not located in Erzgebirge, it is in the Harz Mountains (Erzgebirge is in Saxony)
Thanks for your n ...

A detail of the same sample.

Another sample from Sankt Andreasberg (type locality for the species). It was obtaned in 1967 but very probably is quite older.
4,1 x 3,7 x 2,2 cm.

I'm also agree with Jordi and Peter due to the Quartz or Calcite coating, to the deep greenish-brass color and the crystal shape, that is usually prismatic (sometimes very elongated) or very thick tab ...

And two more (I apologize the quality of the pictures, but I think the samples have interesting characteristics).

The end of the eighties and the nineties Barcelona was a good place for Mexican minerals. I add some samples to the FMF background.

Crystal size would be great for smithsonite.
Thanks, Roger, it is not a bad arguing!

Why do you affirm smithsonite is pseudomorph after calcite if both minerals have the same crystalline forms? (and both are on the same group).
Is some calcite remaining into the crystals? or is it sm ...

Pyritized fossils (why not opalized fossils, i.e?) were usually admitted in most of the collections in the XIX and XX centuries. Currently, they are not so commonly included.
Some peripheral aspects ...

Author	Message
Topic: Donation by Jordi Fabre of part of the Folch Collection duplicates to the MCNA
Carles Curto Replies: 7 Views: 14488	Forum: The Folch Collection Posted: May 24, 2015 06:59 Subject: Donation by Jordi Fabre of part of the Folch Collection duplicates to the MCNA
Carles Curto Replies: 7 Views: 14488	¡Eppur si muove! Yes, sometimes, something important changes in the mineral world, in Spanish Natural History Museums, and in our natural heritage. On the 21 of May the people of Vitoria-Gasteiz w ...
Topic: Tucson, questionable prices?
Carles Curto Replies: 162 Views: 216382	Forum: Mineral Shows Posted: Feb 05, 2015 06:37 Subject: Re: Tucson, questionable prices?
Carles Curto Replies: 162 Views: 216382	A (real) anecdote of Munich 2014: I was with a friend, a good level mineral collector, and we were in a hidden corner at the show watching some Pakistanis and Afghan samples. My friend had an Afghan ...
Topic: Tucson, questionable prices?
Carles Curto Replies: 162 Views: 216382	Forum: Mineral Shows Posted: Feb 05, 2015 06:12 Subject: Re: Tucson, questionable prices?
Carles Curto Replies: 162 Views: 216382	The next? Perhaps some significant amount of "normal" (?) collector will deduce to attend mineral shows is lost time and that it's the moment to left minerals aside. Perhaps some miner ...
Topic: Tucson, questionable prices?
Carles Curto Replies: 162 Views: 216382	Forum: Mineral Shows Posted: Feb 05, 2015 03:13 Subject: Re: Tucson, questionable prices?
Carles Curto Replies: 162 Views: 216382	Accustomed to a relatively stable mineral marked last decades I’m astonished to the spiral increasing of prizes and now, I’m absolutely lost and out (I cannot understand anything). At Munich, past Oct ...
Topic: Tucson, questionable prices?
Carles Curto Replies: 162 Views: 216382	Forum: Mineral Shows Posted: Feb 05, 2015 02:56 Subject: Re: Tucson, questionable prices?
Carles Curto Replies: 162 Views: 216382	The bubbling mineral prizes is a rough reality. From the point of view of the North-American dealers and buyers it can be just a question of buying and selling and it can be only a “take it or leave ...
Topic: Oddities from Brandberg, Namibia
Carles Curto Replies: 70 Views: 64241	Forum: Minerals and Mineralogy Posted: Feb 24, 2014 03:51 Subject: Re: Unknown crystal in Brandberg quartz crystal
Carles Curto Replies: 70 Views: 64241	I don't know if the book is on line (I suppose not). Anhydrite, even considering it, genetically, a dehydrated form of gypsum, is a different species, with a very different structure (orthorhombic, ...
Topic: Oddities from Brandberg, Namibia
Carles Curto Replies: 70 Views: 64241	Forum: Minerals and Mineralogy Posted: Feb 24, 2014 02:08 Subject: Re: Unknown crystal in Brandberg quartz crystal
Carles Curto Replies: 70 Views: 64241	Very probably it is anhydrite. It has been cited, as inclusion, in some Swiss quartzes. As example, you can see pages 140-142 of the book: Hyrsl, J., Niedermayr, G. 2003. Magic world: inclusions in q ...
Topic: Oddities from Brandberg, Namibia
Carles Curto Replies: 70 Views: 64241	Forum: Minerals and Mineralogy Posted: Feb 24, 2014 01:56 Subject: Re: Unknown crystal in Brandberg quartz crystal
Carles Curto Replies: 70 Views: 64241	could it be metallic?
Topic: Panasqueira Mine
Carles Curto Replies: 19 Views: 30105	Forum: Mineralogical Literature Posted: Jan 28, 2014 01:42 Subject: Re: Panasqueira Mine article in Mineralogical Record
Carles Curto Replies: 19 Views: 30105	Thanks to all, but this article would not exist without the great work of Tom Moore and Wendell Wilson.
Topic: Hexagonal green crystal
Carles Curto Replies: 7 Views: 6016	Forum: Minerals and Mineralogy Posted: Nov 28, 2013 02:10 Subject: Re: hexagonal green crystal
Carles Curto Replies: 7 Views: 6016	See information about fluorapatite from Ontario and other similar apatite localities. Quite sure it is fluorapatite.
Topic: Munich Show (Mineralientage) 2013
Carles Curto Replies: 122 Views: 148539	Forum: News about shows Posted: Oct 22, 2013 01:55 Subject: Re: Munich Show (Mineralientage) 2013
Carles Curto Replies: 122 Views: 148539	This year I arrive one day later (on thursday). I travel waiting for gold (a wide offer, I presume) and specially for the "Gold" exhibition (a lot of expectations on it). Novelties, class ...
Topic: Kreuzstein
Carles Curto Replies: 9 Views: 8156	Forum: Mines and Mineral Localities Posted: Jun 17, 2013 05:55 Subject: Re: Kreuzstein
Carles Curto Replies: 9 Views: 8156	...there's something wrong with that locality information: The famous locality of St. Andreasberg is not located in Erzgebirge, it is in the Harz Mountains (Erzgebirge is in Saxony) Thanks for your n ...
Topic: Kreuzstein
Carles Curto Replies: 9 Views: 8156	Forum: Mines and Mineral Localities Posted: Jun 16, 2013 13:46 Subject: Re: Kreuzstein
Carles Curto Replies: 9 Views: 8156	A detail of the same sample.
Topic: Kreuzstein
Carles Curto Replies: 9 Views: 8156	Forum: Mines and Mineral Localities Posted: Jun 16, 2013 13:38 Subject: Re: Kreuzstein
Carles Curto Replies: 9 Views: 8156	Another sample from Sankt Andreasberg (type locality for the species). It was obtaned in 1967 but very probably is quite older. 4,1 x 3,7 x 2,2 cm.
Topic: Pyrrhotite - I lost its origin
Carles Curto Replies: 9 Views: 9769	Forum: Minerals and Mineralogy Posted: May 31, 2013 03:41 Subject: Re: Pyrrhotite - I lost its origin
Carles Curto Replies: 9 Views: 9769	I'm also agree with Jordi and Peter due to the Quartz or Calcite coating, to the deep greenish-brass color and the crystal shape, that is usually prismatic (sometimes very elongated) or very thick tab ...
Topic: Naica Mine - (11)
Carles Curto Replies: 55 Views: 87209	Forum: Featured Columns of FMF Posted: May 24, 2013 01:11 Subject: Re: Naica Mine - (11)
Carles Curto Replies: 55 Views: 87209	And two more (I apologize the quality of the pictures, but I think the samples have interesting characteristics).
Topic: Naica Mine - (11)
Carles Curto Replies: 55 Views: 87209	Forum: Featured Columns of FMF Posted: May 24, 2013 01:03 Subject: Re: Naica Mine - (11)
Carles Curto Replies: 55 Views: 87209	The end of the eighties and the nineties Barcelona was a good place for Mexican minerals. I add some samples to the FMF background.
Topic: New finds out of Mexico - (10)
Carles Curto Replies: 27 Views: 43850	Forum: Featured Columns of FMF Posted: May 21, 2013 00:42 Subject: Re: New finds out of Mexico - (10)
Carles Curto Replies: 27 Views: 43850	Crystal size would be great for smithsonite. Thanks, Roger, it is not a bad arguing!
Topic: New finds out of Mexico - (10)
Carles Curto Replies: 27 Views: 43850	Forum: Featured Columns of FMF Posted: May 20, 2013 06:22 Subject: Re: New finds out of Mexico - (10)
Carles Curto Replies: 27 Views: 43850	Why do you affirm smithsonite is pseudomorph after calcite if both minerals have the same crystalline forms? (and both are on the same group). Is some calcite remaining into the crystals? or is it sm ...
Topic: When can a fossil be also considered a mineral?
Carles Curto Replies: 44 Views: 45087	Forum: Minerals and Mineralogy Posted: May 20, 2013 01:12 Subject: Re: When can a fossil be also considered a mineral?
Carles Curto Replies: 44 Views: 45087	Pyritized fossils (why not opalized fossils, i.e?) were usually admitted in most of the collections in the XIX and XX centuries. Currently, they are not so commonly included. Some peripheral aspects ...