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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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Search found 565 matches |
Author | Message |
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Topic: Can anyone tell me if this is Stellar Beam Calciite? | |
Matt_Zukowski Replies: 8 Views: 1426 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Feb 14, 2024 18:32 Subject: Re: Can anyone tell me if this is Stellar Beam Calciite? |
Whether this is a "Stellar Beam" Calcite or not, we cannot tell you. Stellar Beam is some new age, mystical term, and we like to stick to science here.
As to whether it is calcite, it ce ... |
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Topic: Identification of my mineral | |
Matt_Zukowski Replies: 11 Views: 2026 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Jan 29, 2024 17:23 Subject: Re: Identification of my mineral |
Your piece looks like either quartz or a carbonate like calcite. If it is quartz, it will scratch glass and will not fizz in acid. If it is calcite it will not scratch glass and it will fizz in acid ... | |
Topic: Unknown Macedonian Crystals Help ID! | |
Matt_Zukowski Replies: 10 Views: 3476 |
Forum: What is it? - Where is it from? Posted: Jan 12, 2024 21:04 Subject: Re: Unknown Macedonian Crystals Help ID! |
You can upload more than one picture at a time.
I do not want to click on links I don't recognize from people I don't know, so please post the pictures. |
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Topic: Please Help Me To Identify This Stone. | |
Matt_Zukowski Replies: 17 Views: 5594 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Dec 16, 2023 07:10 Subject: Re: Please Help Me To Identify This Stone. |
Are you sure of the XRF data? Those are huge concentrations of REEs. Perhaps someone else can correct me but I find it hard to believe that you found a natural rock with those concentrations. Moreo ... | |
Topic: Can anyone help me identify the original mineral this pseudomorph? | |
Matt_Zukowski Replies: 4 Views: 2783 |
Forum: What is it? - Where is it from? Posted: Dec 16, 2023 03:56 Subject: Re: Can anyone help me identify the original mineral this pseudomorph? |
Are you sure these are pseudomorphs and not just corroded crystals of some kind. If they are pseudos of some bowtie habit, it could be a zeolite like stilbite, but the pictures don't make me confiden ... | |
Topic: I want to know the sample | |
Matt_Zukowski Replies: 21 Views: 6809 |
Forum: What is it? - Where is it from? Posted: Dec 07, 2023 19:27 Subject: Re: I want to know the sample |
I don't see any reason to assume that these rocks are mono-mineralic. It looks like some sort of clastic rock or corroded igneous rock with a coating of cryptocrystaline quartz on one side. I am not ... | |
Topic: Curating your collection | |
Matt_Zukowski Replies: 11 Views: 6700 |
Forum: Conserving, Preparing and Cleaning Minerals Posted: Nov 17, 2023 22:23 Subject: Re: Curating your collection |
To make things easier for my heirs, I hope to sell my collection before I die. In case I die before that time, my executor has a spreadsheet showing all my current pieces, collection ID number, dimen ... | |
Topic: Isle of Skye collection. First baby steps with super macro | |
Matt_Zukowski Replies: 11 Views: 15100 |
Forum: Micros & Macros - Images of Minerals Posted: Jul 26, 2023 01:28 Subject: Re: Isle of Skye collection. First baby steps with super macro |
Silvia: It sounds like you are taking your pictures with the camera moving. I think you will get better pictures with a stable camera. I typically use a tripod, take one picture focused on the clos ... | |
Topic: Jasper? | |
Matt_Zukowski Replies: 6 Views: 8182 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: May 27, 2023 19:21 Subject: Re: Jasper? |
Your rock doesn't look like jasper to me. It looks like a decomposing piece of felsic intrusive (like a granite) with pink K-feldspar, quartz, white plagioclase feldspar, muscovite, etc. The grainsi ... | |
Topic: Clean and Polish Calcite | |
Matt_Zukowski Replies: 3 Views: 9124 |
Forum: Conserving, Preparing and Cleaning Minerals Posted: May 18, 2023 16:44 Subject: Re: Clean and Polish Calcite |
Are you sure it is calcite? Have you done a fizz test and hardness? I ask because although it certainly could be a carbonate, it looks kind of like chert. | |
Topic: An idea for a collection | |
Matt_Zukowski Replies: 20 Views: 14194 |
Forum: Minerals and Mineralogy Posted: May 11, 2023 01:14 Subject: Re: An idea for a collection |
One of the big knocks on LLMs like chat GPT is that they sometimes very confidently and convincingly make things up. I have heard these called “hallucinations.” Below are some assertions that the LL ... | |
Topic: The first 100 IUGS geological heritage sites | |
Matt_Zukowski Replies: 2 Views: 8178 |
Forum: Mineralogical Literature Posted: Apr 11, 2023 08:21 Subject: Re: The first 100 IUGS geological heritage sites |
I thought that I had seen this before. You posted about this book on Nov 1, 2022 and gave a link to the electronic version of the book:
https://iugs-geoheritage.org/videos-pdfs/iugs_first_100_book_v ... |
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Topic: Search for the locality | |
Matt_Zukowski Replies: 7 Views: 8840 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Apr 10, 2023 21:40 Subject: Re: Search for the locality |
Are the fluorites simple cubes or do they express any modifications? | |
Topic: Diamond pseudomorphs after graphite | |
Matt_Zukowski Replies: 8 Views: 5285 |
Forum: Minerals and Mineralogy Posted: Feb 21, 2023 17:43 Subject: Re: Diamond pseudomorphs after graphite |
Along the lines of where Pete R was going, why do they think it is a pseudomorph? Is it just that it outwardly looks hexagonal? Is it near and aligned with graphite? What are the dimensions? | |
Topic: Unique Schorl Double Terminations | |
Matt_Zukowski Replies: 19 Views: 10330 |
Forum: Minerals and Mineralogy Posted: Jan 19, 2023 22:11 Subject: Re: Unique Schorl Double Terminations |
Maybe it is just preferential dissolution of the basal pinacoid. | |
Topic: Oxidation of Copper, Lead, and Zinc sulfides and transport below the surface | |
Matt_Zukowski Replies: 4 Views: 5505 |
Forum: Minerals and Mineralogy Posted: Jan 03, 2023 22:53 Subject: Re: Oxidation of Copper, Lead, and Zinc sulfides and transport below the surface |
This is a huge topic and the answer depends upon what type of primary mineral deposit is being exposed. Look for books or sections of books titled supergene enrichment. I googled
the string: super ... |
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Topic: Melanophlogite? | |
Matt_Zukowski Replies: 33 Views: 47928 |
Forum: What is it? - Where is it from? Posted: Jan 03, 2023 22:03 Subject: Re: Melanophlogite? |
So far you have shown us a tumbled (naturally or not) stone and some sort of concretion/pseudomorph that looks like it is mostly iron oxide. You have thrown out all sorts of exotic mineral names, som ... | |
Topic: Silurian greywackes on the Berwickshire coast Scotland | |
Matt_Zukowski Replies: 13 Views: 15833 |
Forum: Mines and Mineral Localities Posted: Dec 19, 2022 13:48 Subject: Re: Silurian greywackes on the Berwickshire coast Scotland |
Calcite also fluoresces red so that is not an good way to distinguish it from feldspar. To rephrase what others have said above: consider cleavage, reaction with acid, and hardness to distinguish the ... | |
Topic: Unknown from Kabolela Mine, DRC in association with Brochantite and Heterogenite | |
Matt_Zukowski Replies: 4 Views: 8945 |
Forum: What is it? - Where is it from? Posted: Dec 11, 2022 03:04 Subject: Re: Unknown from Kabolela Mine, DRC in association with Brochantite and Heterogenite |
Tough one. Perhaps you already thought about Chrysocolla, which can be kind of blue and earthy and is reported to be from there, but that is just a guess. And there certainly are many greenish/bluei ... | |
Topic: Does this look familiar to anyone? | |
Matt_Zukowski Replies: 2 Views: 3852 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Nov 13, 2022 20:35 Subject: Re: Does this look familiar to anyone? |
The green chunks have conchoidal fracture and no apparent symmetry. Your description that it has bubbles in it confirms glass slag. I do think you have some glass slag. | |
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