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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 994 matches |
| Author | Message |
|---|---|
 Topic: Fluorite |
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| Roger Warin Replies: 4 Views: 594 |
 Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Mar 06, 2023 04:41 Subject: Re: Fluorite |
| Hannut Show (about 50 km west of Liege): 2023, 03 5.
1st show after winter in Wallonia. It is held on 1 single day. Never, the public attendance was so important. Admission price = € 0. Price per ... |
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| Topic: MIneralogical Record delivery outside USA |
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| Roger Warin Replies: 22 Views: 1835 |
Forum: Mineralogical Literature Posted: Feb 28, 2023 14:38 Subject: Re: MIneralogical Record delivery outside USA |
| "La Poste" was on strike in Belgium today.
Too many parcels and there are no more letters. The postman no longer has time to drink a little drop of whiskey. |
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| Topic: MIneralogical Record delivery outside USA |
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| Roger Warin Replies: 22 Views: 1835 |
Forum: Mineralogical Literature Posted: Feb 28, 2023 06:07 Subject: Re: MIneralogical Record delivery outside USA |
| Hello,
This discussion gives me the opportunity to thank the editor. I offer my congratulations on the honoring of commitments. During its youth, the Mineralogical Record apparently experienced som ... |
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| Topic: Amethyst |
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| Roger Warin Replies: 17 Views: 1356 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Feb 26, 2023 10:40 Subject: Re: Amethyst |
| Hello,
I believe that fluorite and quartz differentiation tests are easy to perform. There are at Richelle (Liege-B), some quartz crystals whose habit is pseudo-cubic. This occurs when the rhombohe ... |
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| Topic: Kyawthuite, the rarest mineral on earth mini guide |
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| Roger Warin Replies: 9 Views: 771 |
Forum: Off-Topic and Introductions Posted: Feb 19, 2023 15:38 Subject: Re: Kyawthuite, the rarest mineral on earth mini guide |
| Precisely, gold is a very special case.
What is the origin of the formation of nuggets? I think that a quantity of gold escaped the migration to the core of the planet because it was not in a metall ... |
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| Topic: Kyawthuite, the rarest mineral on earth mini guide |
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| Roger Warin Replies: 9 Views: 771 |
Forum: Off-Topic and Introductions Posted: Feb 19, 2023 06:02 Subject: Re: Kyawthuite, the rarest mineral on earth mini guide |
| Hello Alfredo,
In this case, IMA does not recognize the species, I think. I believe the Madagascar pezzottaite was only found in one cavity. 1 thousand specimens? Exhausted today? It seems to me t ... |
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| Topic: Elbaite from Pala ? |
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| Roger Warin Replies: 1 Views: 458 |
Forum: Minerals and Mineralogy Posted: Feb 05, 2023 17:00 Subject: Elbaite from Pala ? |
| Hello,
I bought this little elbaite crystal in Munich in 1983. Pala is the imprecise origin given by the seller. Is it plausible? |
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| Topic: Unique Schorl Double Terminations |
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| Roger Warin Replies: 19 Views: 2445 |
Forum: Minerals and Mineralogy Posted: Jan 26, 2023 15:42 Subject: Re: Unique Schorl Double Terminations |
| Hello,
Paraphrasing the words of Pete Richards, I would say that all chemistry and biochemistry obey these laws: I find the shapes of crystals to be among the most elegant manifestations of the self ... |
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| Topic: Unique Schorl Double Terminations |
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| Roger Warin Replies: 19 Views: 2445 |
Forum: Minerals and Mineralogy Posted: Jan 25, 2023 06:14 Subject: Re: Unique Schorl Double Terminations |
| Hello,
I warmly thank Bob Kerr for pulling a magnificent specimen out of his conjurer's hat. Having spent my life as a researcher-teacher (chemistry), I have often explored borders to understand Nat ... |
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| Topic: Unique Schorl Double Terminations |
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| Roger Warin Replies: 19 Views: 2445 |
Forum: Minerals and Mineralogy Posted: Jan 24, 2023 14:28 Subject: Re: Unique Schorl Double Terminations |
| For me, the head of the crystal is not rough but demonstrative.
This is still fast growing because edges grow faster than faces. The Mercedes Cross highlights the ternary c axis of the tourmaline. ... |
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| Topic: Unique Schorl Double Terminations |
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| Roger Warin Replies: 19 Views: 2445 |
Forum: Minerals and Mineralogy Posted: Jan 22, 2023 23:41 Subject: Re: Unique Schorl Double Terminations |
| Hello,
This comment helps me too. Because we know (although it still surprises me) that the crystallization of pegmatite minerals is very fast. The unit of the abscissa axis giving the growth rate ... |
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| Topic: Unique Schorl Double Terminations |
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| Roger Warin Replies: 19 Views: 2445 |
Forum: Minerals and Mineralogy Posted: Jan 22, 2023 03:23 Subject: Re: Unique Schorl Double Terminations |
| Yes, I agree.
But we must take into account the kinetics of growth. The smallest Miller index faces are those with the highest reticular densities (highest atom densities) and are therefore those th ... |
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| Topic: Unique Schorl Double Terminations |
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| Roger Warin Replies: 19 Views: 2445 |
Forum: Minerals and Mineralogy Posted: Jan 20, 2023 08:15 Subject: Re: Unique Schorl Double Terminations |
| Hello,
In Schorl, there is no pinacoid (2 parallel faces) but 2 pedions (single face) because there is no center of symmetry in the crystal. The lower base is called the analogous pole, the upper to ... |
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| Topic: Azurite cleavage |
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| Roger Warin Replies: 9 Views: 1521 |
Forum: Off-Topic and Introductions Posted: Jan 11, 2023 14:07 Subject: Re: Azurite cleavage |
| Hello,
I don't think I've ever seen an azurite cleavage. Here is an old specimen of Tsumeb (Willy Israel) without any breakage but whose termination of a crystal is not harmonious. Blemishes are gr ... |
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| Topic: Melanophlogite? |
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| Roger Warin Replies: 29 Views: 9449 |
Forum: What is it? - Where is it from? Posted: Jan 03, 2023 13:50 Subject: Re: Melanophlogite? |
| I am really very interested in your thoughts.
Can you say more? |
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| Topic: About the tourmaline twin |
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| Roger Warin Replies: 6 Views: 1759 |
Forum: Minerals and Mineralogy Posted: Jan 02, 2023 14:30 Subject: About the tourmaline twin |
| Hello,
Happy new year 2023. I recently had the opportunity to acquire this fine specimen of elbaite from Pederneira. It was purchased from Idar-Oberstein in the 1960s. This is the twin {10.1} reput ... |
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| Topic: How to secure a mineral inside a plastic box? |
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| Roger Warin Replies: 8 Views: 5266 |
Forum: Conserving, Preparing and Cleaning Minerals Posted: Dec 27, 2022 13:55 Subject: Re: How to secure a mineral inside a plastic box? |
| Hello,
I think the problem comes from the atmosphere in the box. It is hardly conceivable to replace it with nitrogen or argon, but why not with CO2? It would suffice to introduce a small piece of ... |
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| Topic: Happy Holidays / 2022-2023 |
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| Roger Warin Replies: 12 Views: 3219 |
Forum: Comments & Suggestions Posted: Dec 22, 2022 12:00 Subject: Re: Happy Holidays / 2022-2023 |
| Olivine and ferronickel in Jepara (Indonesia) pallasite.
XPol; lighting. |
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| Topic: Unknown from Kabolela Mine, DRC in association with Brochantite and Heterogenite |
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| Roger Warin Replies: 4 Views: 1106 |
Forum: What is it? - Where is it from? Posted: Dec 11, 2022 10:57 Subject: Re: Unknown from Kabolela Mine, DRC in association with Brochantite and Heterogenite |
| Hello,
Given the origin, of Kabolela, I think it is either shattuckite or plancheite and certainly not chrysocolla. But since plancheite is lighter than the more pronounced blue shattuckite, so I wo ... |
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| Topic: Favourite mineral species/families? |
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| Roger Warin Replies: 24 Views: 36926 |
Forum: Favourite Minerals Posted: Dec 06, 2022 01:43 Subject: Re: Favourite mineral species/families? |
| Hello,
I knew very well (a matter of age) Roger Titeux from Nancy. Lorrain like me, outside the borders, Roger was a close friend. He often gave me the following advice: Collect hard minerals. Avo ... |
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