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A general guide for using the Forum with some rules and tips
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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| Search found 43 matches |
| Author | Message |
|---|---|
 Topic: Are there pyrite balls found in Verzino? |
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| Herwig Replies: 9 Views: 2203 |
 Forum: Incorrect classification and fakes Posted: Jul 12, 2025 00:49 Subject: Re: Are there pyrite balls found in Verzino? |
| To confirm what Roger wrote this morning:
The rounded balls that you can find on and near the beach of Cap Blanc Nez (France) were all identified by XRD as pyrite. See Tambuyser, P. (1976) Morpho ... |
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| Topic: Silvia's Collection |
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| Herwig Replies: 236 Views: 351443 |
Forum: Women's Private Collections Posted: Jul 04, 2025 04:35 Subject: Re: Silvia's Collection |
| Very interesting contribution, Silvia.
Wonderful to see those old photos (and old specimens). It's crazy how many specimens have been "taken by the hands of time"... And it happened every ... |
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| Topic: Tourmaline Namibia? |
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| Herwig Replies: 4 Views: 2035 |
Forum: What is it? - Where is it from? Posted: Jun 09, 2025 13:51 Subject: Re: Tourmaline Namibia? |
| In all honesty, identifying tourmaline to the species level is impossible by the naked eye.
FYI: one tourmaline crystal can have growth zones of up to 4 different tourmaline species (= 4 different ... |
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| Topic: Skutterudite |
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| Herwig Replies: 4 Views: 1611 |
Forum: Micros & Macros - Images of Minerals Posted: Jun 05, 2025 10:39 Subject: Re: Skutterudite |
| This looks like a sulphide that was (partially?) etched out of some white matrix (a carbonate of some kind?)
Maybe the etching process is responsible for the surface color of the sulphide? Forrest ... |
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| Topic: Thomsonite, Chabazite |
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| Herwig Replies: 2 Views: 1245 |
Forum: Micros & Macros - Images of Minerals Posted: Jun 05, 2025 10:32 Subject: Re: Thomsonite, Chabazite |
| I assume, Forrest, there is a typo in the subject of your message.
(it is thomsonite, not thompsonite) Fixed Would you mind, for all who wonder or are not 100% certain, to tell us: what is the th ... |
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| Topic: Quartz Twins |
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| Herwig Replies: 6 Views: 3690 |
Forum: Minerals and Mineralogy Posted: May 07, 2025 23:40 Subject: Re: Quartz Twins |
| Dear Roger,
I have the impression that your message is missing a photo. If so, please post the photo of your specimen. Thank you. Cheers, Herwig |
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| Topic: Star Quartz |
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| Herwig Replies: 3 Views: 5942 |
Forum: Micros & Macros - Images of Minerals Posted: Apr 19, 2025 22:43 Subject: Re: Star Quartz |
| Nice specimen, Alfredo!
It seems that star quartz is not that unique: it has been found in many different countries. (mindat has photos of such specimens from 9 different countries). Here is th ... |
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| Topic: Bringing a collection to the UK |
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| Herwig Replies: 2 Views: 5939 |
Forum: Off-Topic and Introductions Posted: Apr 18, 2025 22:35 Subject: Re: Bringing a collection to the UK |
| Dear Izak,
I assume that companies like Crystal Classics have a lot of experience with bringing (old) collections into the UK. You can easily find their homepage doing a Google search with their nam ... |
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| Topic: When can a fossil be also considered a mineral? |
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| Herwig Replies: 55 Views: 174203 |
Forum: The Ten Thousand Club Posted: Mar 24, 2025 23:59 Subject: Re: When can a fossil be also considered a mineral? |
| Dear Marco,
you wrote about so many things, it was hard to digest, so to speak. Let's focus on two things. You state: " I came across a bivalve in fluorite from Belgium that seems very uniq ... |
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| Topic: Libyan Desert Glass Structure |
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| Herwig Replies: 67 Views: 96924 |
Forum: Minerals and Mineralogy Posted: Mar 18, 2025 05:11 Subject: Re: Artificial Intelligence and Libyan Desert Glass, tektites |
| Dear Roger,
Can you please let us know the scientific article(s) you based your message on? Cheers, Herwig ----- I don't know if you are aware of this fairly recent publication: Elizaveta K ... |
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| Topic: March 15 & 16 - Nautilus Ghent Mineral & Fossil Show (in Gent, Belgium) |
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| Herwig Replies: 1 Views: 3080 |
Forum: Mineral Shows Posted: Mar 16, 2025 01:07 Subject: March 15 & 16 - Nautilus Ghent Mineral & Fossil Show (in Gent, Belgium) |
| Today will be the second day of this most interesting mineral show. Celebrations are in order, for it is the 50th anniversary of this (normally one day) show.
To celebrate the event, the show moved ... |
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| Topic: Sulfosalts |
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| Herwig Replies: 1 Views: 1973 |
Forum: Micros & Macros - Images of Minerals Posted: Feb 24, 2025 01:56 Subject: Re: Sulfosalts |
| Mon cher Roger,
I have a very hard time believing that your specimen is dufrénoysite. The color and the luster do not match this mineral: https://www.mindat.org/min-1324.html If this were a cryst ... |
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| Topic: It's Tucson Time Again - 2025 |
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| Herwig Replies: 110 Views: 53226 |
Forum: News about Shows Posted: Feb 24, 2025 00:22 Subject: Re: It's Tucson Time Again - 2025 |
| Dear Bob,
Many thanks for posting these "display case photos". Tucson 2025 was a very unusual edition for us: due to some personal issues, we lost 3 days during the week of the Main Show ... |
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| Topic: Stellerite specimens from Piedra Parada, Mexico |
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| Herwig Replies: 8 Views: 5796 |
Forum: Minerals and Mineralogy Posted: Feb 21, 2025 10:51 Subject: Re: Stellerite specimens from Piedra Parada, Mexico |
| Very interesting, Peter!
I assume this is what you are referring to: https://www.mindat.org/photo-1240863.html Those are nice clintonites indeed! |
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| Topic: Stellerite specimens from Piedra Parada, Mexico |
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| Herwig Replies: 8 Views: 5796 |
Forum: Minerals and Mineralogy Posted: Feb 19, 2025 20:38 Subject: Re: Stellerite specimens from Piedra Parada, Mexico |
| Hi John, good to read from you!
Some zeolites always have been a pain in the b*t when it comes to IDing them. In this case, the stellerite is orthorhombic, the stilbites are monoclinic, so an XRD ... |
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