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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 1058 matches |
| Author | Message |
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 Topic: Melanophlogite? |
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| James Catmur Replies: 32 Views: 12379 |
 Forum: What is it? - Where is it from? Posted: Jun 03, 2023 05:00 Subject: Re: Melanophlogite? |
| This site does not allow the sale of minerals or commercial discussions.
If you want to confirm the mineral I suggest you get it tested as we cannot do so from photos alone. |
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| Topic: Westmorland and Cumberland |
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| James Catmur Replies: 4 Views: 4353 |
Forum: Mines and Mineral Localities Posted: Jun 01, 2023 12:40 Subject: Re: Westmorland and Cumberland |
| They are back, time to change all our labels (again)?
https://www.wikiwand.com/en/Cumberland_(unitary_authority) https://www.wikiwand.com/en/Westmorland_and_Furness (links normalized by FMF but f ... |
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| Topic: Curious if image is of Jasper |
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| James Catmur Replies: 4 Views: 312 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: May 31, 2023 12:30 Subject: Re: Curious if image is of Jasper |
| It is often sold by healy feelies, so could have been thrown out by a previous owner. I have no idea if it is really jasper but the hardness suggests it is. | |
| Topic: Curious if image is of Jasper |
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| James Catmur Replies: 4 Views: 312 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: May 31, 2023 08:00 Subject: Re: Curious if image is of Jasper |
| What tests have you done on it? Hardness is the minimum. Locality and size too.
To me it looks mankind made |
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| Topic: Does Citrine Occur Naturally as a Geode? |
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| James Catmur Replies: 11 Views: 707 |
Forum: Incorrect classification and fakes Posted: May 25, 2023 10:28 Subject: Re: Does Citrine Occur Naturally as a Geode? |
| Alfredo
I agree, but I have used 'pocket' too James "Geodas" in spanish can be big or small. I'd translate the big ones as "cavity" in english, and the small ones as " ... |
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| Topic: Does Citrine Occur Naturally as a Geode? |
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| James Catmur Replies: 11 Views: 707 |
Forum: Incorrect classification and fakes Posted: May 25, 2023 10:01 Subject: Re: Does Citrine Occur Naturally as a Geode? |
| Lluis
I am talking about every day Spanish, when out collecting in Spain if we opened a pocket in a mine we always called it 'una geoda' and never 'una bolsada'. I opened one of the best pockets e ... |
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| Topic: Does Citrine Occur Naturally as a Geode? |
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| James Catmur Replies: 11 Views: 707 |
Forum: Incorrect classification and fakes Posted: May 25, 2023 08:51 Subject: Re: Does Citrine Occur Naturally as a Geode? |
| They certainly do occur in 'pockets', which could be where this came from. Pockets- to >geodas- to >geodes? | |
| Topic: Does Citrine Occur Naturally as a Geode? |
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| James Catmur Replies: 11 Views: 707 |
Forum: Incorrect classification and fakes Posted: May 25, 2023 08:24 Subject: Re: Does Citrine Occur Naturally as a Geode? |
| What can complicate such a discussion is the 'geode' in many languages is a false friend with the English word for 'pocket'. For example, the Spanish word 'geoda' normally means 'pocket' in English, i ... | |
| Topic: Does Citrine Occur Naturally as a Geode? |
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| James Catmur Replies: 11 Views: 707 |
Forum: Incorrect classification and fakes Posted: May 25, 2023 07:37 Subject: Re: Does Citrine Occur Naturally as a Geode? |
| We used to find natural citrine in Spain, as single crystals. The ones I have seen in geodes tend to be treated amethyst | |
| Topic: An idea for a collection |
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| James Catmur Replies: 20 Views: 1764 |
Forum: Minerals and Mineralogy Posted: May 18, 2023 12:21 Subject: Re: An idea for a collection |
| Try reading this for Cotham marble
https://www.wikiwand.com/en/Cotham_Marble James |
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| Topic: An idea for a collection |
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| James Catmur Replies: 20 Views: 1764 |
Forum: Minerals and Mineralogy Posted: May 18, 2023 09:53 Subject: Re: An idea for a collection |
| I like the Cotham marble | |
| Topic: Clean and Polish Calcite |
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| James Catmur Replies: 3 Views: 458 |
Forum: Conserving, Preparing and Cleaning Minerals Posted: May 18, 2023 09:19 Subject: Re: Clean and Polish Calcite |
| It looks very heavily weathered to me. If you want to polish it maybe head to a polished stones forum, as we deal with natural specimens on this forum. I doubt you could tumble it but maybe you coul ... | |
| Topic: An idea for a collection |
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| James Catmur Replies: 20 Views: 1764 |
Forum: Minerals and Mineralogy Posted: May 11, 2023 12:09 Subject: Re: An idea for a collection |
| This post is also relevant as the IUGS publication (available as a book, PDF or website) runs through the formation of rocks and minerals over the life of the planet
https://www.mineral-forum.com/m ... |
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| Topic: An idea for a collection |
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| James Catmur Replies: 20 Views: 1764 |
Forum: Minerals and Mineralogy Posted: May 11, 2023 02:05 Subject: Re: An idea for a collection |
| I had an interesting discussion yesterday about the safety assurance of LLMs. We (Safety Critical Systems Club - SCSC) are working on safety assurance of services, and are finding lots of cases of se ... | |
| Topic: An idea for a collection |
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| James Catmur Replies: 20 Views: 1764 |
Forum: Minerals and Mineralogy Posted: May 10, 2023 23:45 Subject: Re: An idea for a collection |
| I just checked the post's link to the second article and corrected the link, as it had changed
Thanks, James, I will dig into that. The link is appreciated. |
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| Topic: An idea for a collection |
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| James Catmur Replies: 20 Views: 1764 |
Forum: Minerals and Mineralogy Posted: May 10, 2023 23:35 Subject: Re: An idea for a collection |
| This post might interest you and help you select suitable minerals
https://www.mineral-forum.com/message-board/viewtopic.php?p=78923#78923 It might be a challenge: Life played a direct or ind ... |
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| Topic: A.I. generated minerals |
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| James Catmur Replies: 11 Views: 1021 |
Forum: Mineral Art and Artists Posted: May 07, 2023 05:44 Subject: Re: A.I. generated minerals |
| Sadly, it seems many human already do imaginary localities, either to match incorrect labels or to hide the true source of new material. The AI will have to catch up.
I'm just wondering how long it ... |
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| Topic: A.I. generated minerals |
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| James Catmur Replies: 11 Views: 1021 |
Forum: Mineral Art and Artists Posted: May 06, 2023 13:21 Subject: Re: A.I. generated minerals |
| Alfredo, it is just a new toy and people will play with it. There is little we can do to halt the tide, but once they have played I hope it will calm down. | |
| Topic: Azurite to Malachite Chemistry |
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| James Catmur Replies: 9 Views: 875 |
Forum: Minerals and Mineralogy Posted: May 04, 2023 07:58 Subject: Re: Azurite to Malachite Chemistry |
| So it is similar to the way rust spreads across steel? Interesting
Totally agree, Lluis, The attack is done at the level of the unit cell and the surrounding gas. I think that the writing of equa ... |
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| Topic: Collection of Joseph D'Oliveira |
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| James Catmur Replies: 117 Views: 177352 |
Forum: Collection photos and Collector's page Posted: May 04, 2023 04:38 Subject: Re: Collection of Joseph D'Oliveira |
| More interesting Calcite form than the one I have in a geode from Brasil | |
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