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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 595 matches |
| Author | Message |
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 Topic: Ghost dendrite |
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| Matt_Zukowski Replies: 7 Views: 2622 |
 Forum: Minerals and Mineralogy Posted: May 02, 2025 17:55 Subject: Re: Ghost dendrite |
| I can think of a couple of unlikely possibilities:
1) Aqueous mobilization - It seems hard to me to mobilize through dissolution these Fe/Mn oxides in such a static environment because i can't imag ... |
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| Topic: Wulfenite and Mimetite |
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| Matt_Zukowski Replies: 17 Views: 191750 |
Forum: Micros & Macros - Images of Minerals Posted: Apr 04, 2025 15:26 Subject: Re: Wulfenite and Mimetite |
| Again, the limonite is not replacing the fluorite, so not a pseudomorph. | |
| Topic: Wulfenite and Mimetite |
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| Matt_Zukowski Replies: 17 Views: 191750 |
Forum: Micros & Macros - Images of Minerals Posted: Apr 04, 2025 15:21 Subject: Re: Wulfenite and Mimetite |
| In your picture I see fluorite and what looks like it could be siderite, and in places it looks like the siderite is coating the fluorite. This is not what pseudomorphing is. With a pseudomorph, a m ... | |
| Topic: Wulfenite and Mimetite |
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| Matt_Zukowski Replies: 17 Views: 191750 |
Forum: Micros & Macros - Images of Minerals Posted: Apr 04, 2025 14:36 Subject: Re: WULFENITE after Mimetite |
| A pseudomorph (pseudo=false, morph=form) is a mineral that has replaced and taken on the form of another mineral. A true wulfenite after mimetite would be made of wulfenite (a tetragonal mineral) but ... | |
| Topic: Wulfenite and Mimetite |
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| Matt_Zukowski Replies: 17 Views: 191750 |
Forum: Micros & Macros - Images of Minerals Posted: Apr 04, 2025 13:27 Subject: Re: WULFENITE after Mimetite |
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Mineral: Wulfenite after Mimetite Locality: Mapimí, Municipio Mapimí, Durango, Mexico Dimensions: 1 - 3 mm crystals "wulfenite after mimetite" implies that wulfenite is pseudomo ... |
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| Topic: Carrock Mine, Mungrisdale, Eden, Cumbria, England |
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| Matt_Zukowski Replies: 7 Views: 18072 |
Forum: Rockhounding trips Posted: Mar 01, 2025 16:46 Subject: Re: Carrock Mine, Mungrisdale, Eden, Cumbria, England |
| Wolframite refers to the Wolframite group of minerals which includes Hübnerite and Ferberite, or to material that is intermediate in composition between these two end members.
https://www.mindat.org/ ... |
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| Topic: Hello all, just wanted to confirm if Hardin, Elmwood or Mexican Fluorite |
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| Matt_Zukowski Replies: 2 Views: 2117 |
Forum: What is it? - Where is it from? Posted: Feb 28, 2025 16:54 Subject: Re: Hello all, just wanted to confirm if Hardin, Elmwood or Mexican Fluorite |
| I am not sure but it looks like your specimen may have "carthage corners" (lighter colored material in the corners). If so, then it probably is Elmwood. | |
| Topic: Fake titanium quartz crystal ponder |
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| Matt_Zukowski Replies: 5 Views: 3135 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Feb 23, 2025 15:27 Subject: Re: Fake titanium quartz crystal ponder |
| The form looks like it could be quartz, but i cant be sure from 3 fuzzy pictures. You also said it scratches glass. This plus the form makes me think it is quartz.
Go to the website mindat and lo ... |
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| Topic: If anybody knows this gemstone, please tell me |
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| Matt_Zukowski Replies: 7 Views: 9565 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Feb 04, 2025 17:17 Subject: Re: If anybody knows this gemstone, please tell me |
| georgejone414:
You have a habit of posting blurry pictures of things without any other information and asking us what you have. This is not fair to us. At least: 1) make sure your pictures are no ... |
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| Topic: Unknown from Tsumeb |
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| Matt_Zukowski Replies: 11 Views: 4518 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Feb 02, 2025 12:42 Subject: Re: Unknown from Tsumeb |
| A better picture won't help. You'll need to have it analyzed as discussed above. | |
| Topic: Need assistance to distinguish the type of this gemstone |
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| Matt_Zukowski Replies: 2 Views: 3088 |
Forum: Minerals and Mineralogy Posted: Jan 30, 2025 19:07 Subject: Re: Need assistance to distinguish the type of this gemstone |
| We will not be able to help you without more information as discussed here:
https://www.mineral-forum.com/message-board/viewtopic.php?t=1936 That said, if the rock has been faceted, we a very unli ... |
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| Topic: I want to know the price of the following Ruby |
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| Matt_Zukowski Replies: 2 Views: 2825 |
Forum: Minerals and Mineralogy Posted: Jan 30, 2025 19:02 Subject: Re: I want to know the price of the following Ruby |
| We don't discuss values here. You should go elsewhere, perhaps a local jeweler. | |
| Topic: Unknown from Tsumeb |
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| Matt_Zukowski Replies: 11 Views: 4518 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Jan 30, 2025 14:31 Subject: Re: Unknown from Tsumeb |
| It certainly could be minrecordite - see:
https://www.mindat.org/photo-1284257.html |
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| Topic: It's Tucson Time Again - 2025 |
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| Matt_Zukowski Replies: 110 Views: 51558 |
Forum: News about Shows Posted: Jan 24, 2025 17:56 Subject: Re: It's Tucson Time Again |
| IMG_2247 could be kolwezite after azurite - i have seen some that look kinda like this. But it looks more to me like malachite after azurite. | |
| Topic: Carbonado |
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| Matt_Zukowski Replies: 23 Views: 6447 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Jan 07, 2025 07:04 Subject: Re: Carbonado |
| Perhaps you can take it to a jeweler - I don't know if they are set up to ID carbonados, but perhaps they can point you in the right direction. | |
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