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Newest topics and users posts
11 May-21:01:46 Re: the mizunaka collection - fluorite (Am Mizunaka)
11 May-08:49:40 Re: a mineralogical trip through germany / baden-wuerttemberg (Tobi)
11 May-08:44:49 Re: the mizunaka collection - fluorite (Tobi)
11 May-06:20:29 Re: collection of volkmar stingl (Volkmar Stingl)
11 May-04:39:24 Re: soon 15 years of fmf and how to achieve many more (James Catmur)
11 May-02:11:53 Re: soon 15 years of fmf and how to achieve many more (Peter Lemkin)
10 May-23:55:01 The mizunaka collection - fluorite (Am Mizunaka)
10 May-21:34:36 Re: don lum collection (Don Lum)
10 May-12:52:14 Re: a mineralogical trip through germany / baden-wuerttemberg (Jesse Fisher)
10 May-12:23:01 Re: soon 15 years of fmf and how to achieve many more (Makokerowill)
09 May-23:10:51 Re: magnetic serpentine? (Ken)
09 May-11:45:05 Re: collection of michael shaw (Michael Shaw)
09 May-11:22:06 Re: collection of firmo espinar (Firmo Espinar)
08 May-11:32:22 Re: hillman hall of minerals and gems (Tom Mazanec)
08 May-02:15:29 Re: magnetic serpentine? (Alfredo)
08 May-00:00:15 Re: monthly mineral chronicles, mineral guides and more... (Crocoite)
07 May-21:45:34 Magnetic serpentine? (Ken)
07 May-13:00:12 Re: collection of benjamin carballo (Benj)
07 May-07:03:24 Re: collection of david carter (Jordi Fabre)
07 May-06:44:30 Re: collection of david carter (David916)
07 May-06:36:35 Re: collection of benjamin carballo (Benj)
07 May-06:29:30 Re: collection of david carter (David916)
06 May-19:49:56 Re: the mizunaka collection - quartz over chrysocolla (Am Mizunaka)
06 May-14:33:39 Re: a mineralogical trip through italy by sante celiberti (Sante Celiberti)
06 May-10:24:20 Re: collection of david carter (David916)

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The information provided within this Forum about localities is only given to allow reference to them. Any visit to any of the localities requires you to obtain full permission and relevant information prior to your visit. FMF is strictly against any illicit activities related to collecting minerals.
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Author Message
  Topic: A new mineral: alpha-calcium formate
Roger Warin

Replies: 9
Views: 711

PostForum: Minerals and Mineralogy   Posted: May 02, 2021 05:34   Subject: Re: A new mineral: alpha-calcium formate
Hello

Formicaite is located at the crossroads of two worlds of our planet: the mineral world and the organic world, resulting from living things, but also from stellar nucleosynthesis.
Formicaite ...
  Topic: Tucson - 2021 April
Roger Warin

Replies: 25
Views: 3923

PostForum: Mineral Shows   Posted: Apr 26, 2021 04:44   Subject: Re: Tucson - 2021 April
Hello Robert,
Excuse me, I'm sorry because my memory has faltered. This type of specimen is so rare that I had forgotten its existence. In fact, I don't look at my old photos enough.
Cornetite was o ...
  Topic: Price changes
Roger Warin

Replies: 16
Views: 1506

PostForum: Off-Topic and Introductions   Posted: Apr 25, 2021 14:44   Subject: Re: Price changes
Hello,

These values attributed to aesthetic specimens are prohibitive.
They are only the result of collective intellectual pollution.
Never an informed collector will fall into this trap.
Once a ...
  Topic: How does color treating "work"?
Roger Warin

Replies: 6
Views: 484

PostForum: Off-Topic and Introductions   Posted: Apr 24, 2021 16:19   Subject: Re: How does color treating "work"?
Hello,

Being a chemist, and president of an amateur club AGAB (Belgium), I saw fit to specify the "real" origin of the colors of ruby and sapphire. So I published 2 articles on this subje ...
  Topic: Tucson - 2021 April
Roger Warin

Replies: 25
Views: 3923

PostForum: Mineral Shows   Posted: Apr 23, 2021 22:42   Subject: Re: Tucson - 2021 April
Is it cornetite ?
  Topic: Soon 15 years of FMF and how to achieve many more
Roger Warin

Replies: 20
Views: 1515

PostForum: Comments & Suggestions   Posted: Apr 21, 2021 12:59   Subject: Re: Soon 15 years of FMF and how to achieve many more
Jordi,
Congratulations and thank you for your loyalty, down to the smallest detail.
Never seen.
Your role, even supported by your firm, is a hope for the continuity of amateur mineralogy and ultima ...
  Topic: Tucson - 2021 April
Roger Warin

Replies: 25
Views: 3923

PostForum: Mineral Shows   Posted: Apr 21, 2021 02:27   Subject: Re: Tucson - 2021 April
Hello,
There are specimens of great value.
Several criteria can determine the cost: aesthetics, crystallographic aspects, rarity, origin, etc.
In my opinion, one of the first qualities must be tena ...
  Topic: Comparison between 2 microscopes
Roger Warin

Replies: 0
Views: 1068

PostForum: Minerals and Mineralogy   Posted: Feb 16, 2021 15:41   Subject: Comparison between 2 microscopes
Hello,
I would like to remind you that the examination of meteorites is also mineralogy.
The only difference, the pebbles formed in zero gravity, in the form of small silicate spheres called chondru ...
  Topic: Chromium in jewels
Roger Warin

Replies: 3
Views: 1409

PostForum: Off-Topic and Introductions   Posted: Jan 29, 2021 09:04   Subject: Re: Chromium in jewels
CORUNDUM Al2O3 versus EMERALD Be3Al2(Si6O18).).

The origin of colors in mineralogy is even more difficult to understand than crystallography.
It can be of chemical origin or, more subtly, of physi ...
  Topic: Pyrite with bubble-like growths
Roger Warin

Replies: 21
Views: 4721

PostForum: Minerals and Mineralogy   Posted: Jan 19, 2021 17:42   Subject: Re: Pyrite with bubble-like growths
What becomes of the crystal lattice?
  Topic: Schorl
Roger Warin

Replies: 10
Views: 2521

PostForum: Micros & Macros - Images of Minerals   Posted: Jan 19, 2021 17:38   Subject: Re: Schorl
Hello,
Tourmaline is my favorite mineral, because its structure is such that it is a lesson in tolerance and philosophy. Nations on Earth should emulate it.
It crystallizes at the end of the crystal ...
  Topic: Stay at home - Coronavirus / Covid-19
Roger Warin

Replies: 345
Views: 102009

PostForum: National Library of Spain / Biblioteca Nacional de España (BNE) and FMF   Posted: Jan 08, 2021 18:00   Subject: Re: Stay at home - Coronavirus / Covid-19
Hi Don,
Thank you for your answer, because my language as a chemist is not always well understood.
No, your mind is not at all simple. Quite the contrary.
You describe the same reality as me.
What ...
  Topic: Stay at home - Coronavirus / Covid-19
Roger Warin

Replies: 345
Views: 102009

PostForum: National Library of Spain / Biblioteca Nacional de España (BNE) and FMF   Posted: Jan 08, 2021 03:41   Subject: Re: Stay at home - Coronavirus / Covid-19
Hi Don,
I am not a medical professional, nor even an amateur.
It was a choice I made when I was 18 and I have never regretted it.
Professional chemistry (and physics) has given me much more satisfa ...
  Topic: Stay at home - Coronavirus / Covid-19
Roger Warin

Replies: 345
Views: 102009

PostForum: National Library of Spain / Biblioteca Nacional de España (BNE) and FMF   Posted: Jan 07, 2021 16:25   Subject: Re: Stay at home - Coronavirus / Covid-19
Coronavirus COVID-19 in the atmosphere ?

Although having been a teacher-researcher in chemistry at the university ULiege, I did not understand clearly the physical state and the means of transport ...
  Topic: Pyrite with bubble-like growths
Roger Warin

Replies: 21
Views: 4721

PostForum: Minerals and Mineralogy   Posted: Jan 07, 2021 14:48   Subject: Re: Pyrite with bubble-like growths
Hi, Sante, all,
The answer is complex.
In industry, sulfuric acid can be prepared by the pyrite roasting process.
In rotary kilns, pyrites are burnt in the presence of air at high temperature. SO2 ...
  Topic: Luxullianite - UK
Roger Warin

Replies: 1
Views: 1562

PostForum: Minerals and Mineralogy   Posted: Jan 03, 2021 05:43   Subject: Luxullianite - UK
Hello,

Last but not least, yet importantly!
Happy New Year…

Comment: Beautiful terrestrial thin sections. It is worth the most beautiful meteorites by the underlying story.
Luxullianite is a ...
  Topic: Cutting diamonds
Roger Warin

Replies: 5
Views: 1951

PostForum: Off-Topic and Introductions   Posted: Jan 01, 2021 17:00   Subject: Re: Cutting diamonds
Hello diamond lovers
Here are some specimens.
  Topic: Pyrite with bubble-like growths
Roger Warin

Replies: 21
Views: 4721

PostForum: Minerals and Mineralogy   Posted: Jan 01, 2021 15:15   Subject: Re: Pyrite with bubble-like growths
I think this is not a problem. I see in this crystal a big difference in the time scale.
I therefore suppose that "long" after the first perfect crystallization and a long resting time, the ...
  Topic: Pyrite with bubble-like growths
Roger Warin

Replies: 21
Views: 4721

PostForum: Minerals and Mineralogy   Posted: Jan 01, 2021 08:40   Subject: Re: Pyrite with bubble-like growths
Hello Pete, all,
I am thinking of late crystallization (like parallel growth type).
The freshly crystallized micro-pyrite at this time would have been in competition with a dissolution phenomenon.
...
  Topic: Presentation of new members - Reference Thread
Roger Warin

Replies: 438
Views: 331319

PostForum: Off-Topic and Introductions   Posted: Nov 27, 2020 23:32   Subject: Re: Presentation of new members - Alain Abreal from France, passionate about minerals
I know Alain by the remarkable description of precision of the various twins he made. It is a real pleasure to read his articles on this frequently presented subject.
Alain reviews the various types ...
 
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