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Newest topics and users posts
05 Mar-10:20:51 Re: collection of michael shaw (Michael Shaw)
05 Mar-03:25:18 The mizunaka collection - smoky quartz (Am Mizunaka)
05 Mar-00:11:17 Re: collection of volkmar stingl (Volkmar Stingl)
04 Mar-14:20:40 Re: the mizunaka collection - quartz pseudomorph (Am Mizunaka)
04 Mar-13:00:50 Re: locality for mexican quartz specimens (Peter Megaw)
04 Mar-05:13:53 Re: locality for mexican quartz specimens (James Catmur)
04 Mar-04:56:59 Re: collection of jean suffert (Jean Suffert)
04 Mar-04:19:20 Re: collection of jean suffert (Jean Suffert)
04 Mar-03:47:58 Re: collection of jean suffert (Jean Suffert)
04 Mar-03:08:26 Re: the mizunaka collection - quartz pseudomorph (Tobi)
04 Mar-03:03:49 Re: beautiful durable and...common? (Lluis)
04 Mar-03:00:13 Re: collection of jean suffert (Tobi)
04 Mar-02:56:32 Re: new generation for picture - ploum (Tobi)
04 Mar-02:54:07 Re: popular minerals - octahedral fluorite from shangbao mine, china (Tobi)
04 Mar-02:50:53 Re: collection of michael shaw (Tobi)
03 Mar-21:09:37 Re: locality for mexican quartz specimens (Brent Lockhart)
03 Mar-20:51:38 Re: locality for mexican quartz specimens (Peter Megaw)
03 Mar-20:24:39 Locality for mexican quartz specimens (Brent Lockhart)
03 Mar-17:04:41 Re: alabama copper? quartz or quartzite and red to almost green mineral along with?? (Rforbus)
03 Mar-16:25:53 The mizunaka collection - quartz pseudomorph (Am Mizunaka)
03 Mar-16:22:27 Re: collection of sante celiberti (Sante Celiberti)
03 Mar-15:27:31 Re: beautiful durable and...common? (Steveb)
03 Mar-13:14:23 Re: alabama copper? quartz or quartzite? big sur jade? almost green mineral along with?? (Rforbus)
03 Mar-11:57:25 Re: alabama copper? quartz or quartzite and red to almost green mineral along with?? (Rforbus)
03 Mar-11:25:00 Re: alabama copper? quartz or quartzite and red to almost green mineral along with?? (Bob Carnein)

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  Topic: Donation by Jordi Fabre of part of the Folch Collection duplicates to the MCNA
Carles Curto

Replies: 7
Views: 23684

PostForum: The Folch Collection   Posted: May 24, 2015 06:59   Subject: Donation by Jordi Fabre of part of the Folch Collection duplicates to the MCNA
¡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: 249769

PostForum: Mineral Shows   Posted: Feb 05, 2015 06:37   Subject: Re: Tucson, questionable prices?
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: 249769

PostForum: Mineral Shows   Posted: Feb 05, 2015 06:12   Subject: Re: Tucson, questionable prices?
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: 249769

PostForum: Mineral Shows   Posted: Feb 05, 2015 03:13   Subject: Re: Tucson, questionable prices?
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: 249769

PostForum: Mineral Shows   Posted: Feb 05, 2015 02:56   Subject: Re: Tucson, questionable prices?
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: 71140

PostForum: Minerals and Mineralogy   Posted: Feb 24, 2014 03:51   Subject: Re: Unknown crystal in Brandberg quartz crystal
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: 71140

PostForum: Minerals and Mineralogy   Posted: Feb 24, 2014 02:08   Subject: Re: Unknown crystal in Brandberg quartz crystal
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: 71140

PostForum: Minerals and Mineralogy   Posted: Feb 24, 2014 01:56   Subject: Re: Unknown crystal in Brandberg quartz crystal
could it be metallic?
  Topic: Panasqueira Mine
Carles Curto

Replies: 19
Views: 38202

PostForum: Mineralogical Literature   Posted: Jan 28, 2014 01:42   Subject: Re: Panasqueira Mine article in Mineralogical Record
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: 6939

PostForum: Minerals and Mineralogy   Posted: Nov 28, 2013 02:10   Subject: Re: hexagonal green crystal
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: 164462

PostForum: News about shows   Posted: Oct 22, 2013 01:55   Subject: Re: Munich Show (Mineralientage) 2013
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: 9359

PostForum: Mines and Mineral Localities   Posted: Jun 17, 2013 05:55   Subject: Re: Kreuzstein
...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: 9359

PostForum: Mines and Mineral Localities   Posted: Jun 16, 2013 13:46   Subject: Re: Kreuzstein
A detail of the same sample.
  Topic: Kreuzstein
Carles Curto

Replies: 9
Views: 9359

PostForum: Mines and Mineral Localities   Posted: Jun 16, 2013 13:38   Subject: Re: Kreuzstein
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: 10735

PostForum: Minerals and Mineralogy   Posted: May 31, 2013 03:41   Subject: Re: Pyrrhotite - I lost its origin
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: 98367

PostForum: Featured Columns of FMF   Posted: May 24, 2013 01:11   Subject: Re: Naica Mine - (11)
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: 98367

PostForum: Featured Columns of FMF   Posted: May 24, 2013 01:03   Subject: Re: Naica Mine - (11)
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: 51466

PostForum: Featured Columns of FMF   Posted: May 21, 2013 00:42   Subject: Re: New finds out of Mexico - (10)
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: 51466

PostForum: Featured Columns of FMF   Posted: May 20, 2013 06:22   Subject: Re: New finds out of Mexico - (10)
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: 50
Views: 61165

PostForum: Minerals and Mineralogy   Posted: May 20, 2013 01:12   Subject: Re: When can a fossil be also considered a mineral?
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 ...
 
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