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FMF - Friends of Minerals Forum, discussion and message board
The place to share your mineralogical experiences


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Newest topics and users posts
29 Mar-08:09:52 Re: collection of tobi (Tobi)
29 Mar-07:25:48 Re: collection of volkmar stingl (Tobi)
29 Mar-06:20:21 Re: identification question (James Catmur)
29 Mar-00:03:53 Identification question (Jim Wilkinson)
28 Mar-23:16:36 Re: collection of volkmar stingl (Volkmar Stingl)
28 Mar-18:25:15 Re: collection of firmo espinar (Firmo Espinar)
28 Mar-09:37:50 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Cfrench58)
27 Mar-19:47:08 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Pete Richards)
27 Mar-16:15:44 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Cfrench58)
27 Mar-15:18:59 Re: 2 unknowns co-occurring with caledonite, grand reef mine, az (Alfredo)
27 Mar-14:39:29 2 unknowns co-occurring with caledonite, grand reef mine, az (Cfrench58)
27 Mar-05:21:48 Re: the mim museum in beirut, lebanon (Mim Museum)
27 Mar-05:03:26 Re: trying to find information on rose/pink quartz and tourmaline associations. (Ning)
27 Mar-02:39:50 Re: the mim museum in beirut, lebanon (Tobi)
27 Mar-00:23:28 Re: collection of volkmar stingl (Volkmar Stingl)
26 Mar-00:53:41 Re: collection of volkmar stingl (Volkmar Stingl)
25 Mar-13:32:10 Re: collection of michael shaw (Michael Shaw)
25 Mar-00:25:58 The mizunaka collection - quartz (Am Mizunaka)
23 Mar-13:35:22 Re: collection of firmo espinar (Firmo Espinar)
22 Mar-08:32:28 Re: collection of michael shaw (Michael Shaw)
22 Mar-04:20:41 Re: the mim museum in beirut, lebanon (Mim Museum)
21 Mar-22:49:19 Re: green seam. Looks like it in a state of decay. (Ning)
21 Mar-22:47:40 Re: green seam. Looks like it in a state of decay. (Ning)
21 Mar-22:45:25 Re: green seam. Looks like it in a state of decay. (Ning)
21 Mar-15:34:23 Re: the mizunaka collection - quartz (Am Mizunaka)

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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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  Topic: Can anyone tell me if this is Stellar Beam Calciite?
Matt_Zukowski

Replies: 8
Views: 1002

PostForum: 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 ...
  Topic: Identification of my mineral
Matt_Zukowski

Replies: 11
Views: 1512

PostForum: 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: 3029

PostForum: 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.
  Topic: Please Help Me To Identify This Stone.
Matt_Zukowski

Replies: 17
Views: 5200

PostForum: 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: 2624

PostForum: 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: 6381

PostForum: 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: 6237

PostForum: 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: 14520

PostForum: 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: 7860

PostForum: 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: 8654

PostForum: 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: 13580

PostForum: 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: 7808

PostForum: 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 ...
  Topic: Search for the locality
Matt_Zukowski

Replies: 7
Views: 8607

PostForum: 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: 4937

PostForum: 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: 9619

PostForum: 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: 4886

PostForum: 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 ...
  Topic: Melanophlogite?
Matt_Zukowski

Replies: 33
Views: 44574

PostForum: 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: 15364

PostForum: 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: 8700

PostForum: 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: 3630

PostForum: 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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