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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 404 matches |
| Author | Message |
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 Topic: Tourmaline Namibia? |
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| Riccardo Modanesi Replies: 4 Views: 1043 |
 Forum: What is it? - Where is it from? Posted: Jun 09, 2025 05:45 Subject: Re: Tourmaline Namibia? |
| hi to everybody!
it could be tsilaisite or dravite, I would say tsilaisite. Greetings from Italy by Riccardo. |
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| Topic: Ghost dendrite |
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| Riccardo Modanesi Replies: 7 Views: 2209 |
Forum: Minerals and Mineralogy Posted: May 03, 2025 11:16 Subject: Re: Ghost dendrite |
| Hi to everybody!
There could be another possibility: the dendrites are made of manganese and iron oxides and hydroxides. As the biggest majority of you knows, iron oxidates from Fe++ to Fe+++ with th ... |
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| Topic: If anybody knows this gemstone, please tell me |
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| Riccardo Modanesi Replies: 7 Views: 9240 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Apr 24, 2025 15:16 Subject: Re: If anybody knows this gemstone, please tell me |
| Hi to everybody!
I think the dark-red crystals are spessartine garnets and the mother-rock pegmatite. I found many similar crystals in Val Codera (Lombardy, Italy), that's why I am pretty sure of. G ... |
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| Topic: Help Identifiying: Moonstone? |
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| Riccardo Modanesi Replies: 4 Views: 2022 |
Forum: What is it? - Where is it from? Posted: Apr 15, 2025 02:02 Subject: Re: Help Identifiying: Moonstone? |
| Hi to everybody!
As a gemmologist I can say it is a glass! Veils and gas bubbles are evident inside there! But some synthetic spinels take this opalescence effect and are made to imitate moonstone! ... |
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| Topic: Limonitized garnet? |
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| Riccardo Modanesi Replies: 36 Views: 13281 |
Forum: What is it? - Where is it from? Posted: Jan 28, 2025 03:11 Subject: Re: Limonitized garnet? |
| Hi Roger!
I think I agree with you: just label it as olivine or peridot and don't search strange adventures. Glossary and other manuals keep just extreme terms in mineral series. Plagioclases, for in ... |
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| Topic: Book(s) about minerals for children ? |
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| Riccardo Modanesi Replies: 4 Views: 3625 |
Forum: Mineralogical Literature Posted: Jan 15, 2025 02:53 Subject: Re: Book(s) about minerals for children ? |
| Hi to everybody!
Another book I can advice you is "MineRari", by Marco Majrani and Valentina Quadrio. Unfortunately for many of you it's in Italian, but images and drawings are nice! Greet ... |
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| Topic: Tektite ? |
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| Riccardo Modanesi Replies: 5 Views: 2422 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Dec 17, 2024 10:12 Subject: Re: Tektite ? |
| Hi to everybody!
By seeing these photos I can say it's an agate. I found many of them in Idar-Oberstein, even along the forest paths around the town. Greetings from Italy by Riccardo. |
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| Topic: I think this is Malachite after Barite? thoughts? |
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| Riccardo Modanesi Replies: 8 Views: 6869 |
Forum: Minerals and Mineralogy Posted: Dec 12, 2024 10:58 Subject: Re: I think this is Malachite after Barite? thoughts? |
| Hi to everybody!
Nothing to be astonished about! Azurite, malachite and dioptase are all copper minerals, therefore it's not surprising they grow up together! Malachite after baryte? Mmmmhhhh!!! I w ... |
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| Topic: Colors of minerals |
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| Riccardo Modanesi Replies: 7 Views: 6503 |
Forum: Minerals and Mineralogy Posted: Sep 18, 2024 08:50 Subject: Re: Colors of minerals |
| Hi to everybody!
As a gemmologist I can have some considerations. First of all a colour perception is very subjective and personal, nevertheless there are some percentage of primary colours compoundi ... |
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| Topic: Altered quartz or pseudomorph? |
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| Riccardo Modanesi Replies: 7 Views: 4998 |
Forum: What is it? - Where is it from? Posted: Jul 30, 2024 08:23 Subject: Re: Altered quartz or pseudomorph? |
| Hi to everybody!
I don't fell like excluding another one which wasn't mentioned yet by anybody here: FLUORITE! It's not so seldom to find it as a covering mineral on quartz crystals! Greetings from ... |
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| Topic: Vorobyevite, a 7th variety of beryl |
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| Riccardo Modanesi Replies: 2 Views: 3808 |
Forum: Minerals and Mineralogy Posted: Jul 24, 2024 05:56 Subject: Re: Vorobyevite, a 7th variety of beryl |
| Hi to everybody!
Vorobyevite is NOT a mineral species, but a variety of beryl, like aquamarine, emerald, morganite etc! Varieties are NOT species! Greetings from Italy by Riccardo. |
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| Topic: Help to identify a find |
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| Riccardo Modanesi Replies: 9 Views: 6104 |
Forum: What is it? - Where is it from? Posted: May 25, 2024 02:46 Subject: Re: Help to identify a find |
| Hi to everybody!
Such material is usually sold as "carborundum" or "carborandite", which is silicon carbide whose thermical conductivity is very similar to the diamond. Cut gemsto ... |
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| Topic: European Mineral and Mining Museums |
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| Riccardo Modanesi Replies: 11 Views: 30567 |
Forum: Worlwide Museums & Visits to Museums and private collections Posted: May 16, 2024 11:43 Subject: Re: European Mineral and Mining Museums |
| Hi to everybody!
As I am Italian, I can recommend you the Natural History Museum in Milan, but there is one in Rome too! Then there is one in Trento, Northern Italy, and historical mines in Sicily an ... |
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| Topic: Collection of Philippe Durand |
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| Riccardo Modanesi Replies: 360 Views: 450327 |
Forum: Collection photos and Collector's page Posted: Mar 11, 2024 16:19 Subject: Re: Collection of Philippe Durand |
| Hi to everybody, hi Philippe!
Ok, it's difficult to detect an inclusion just by seeing a photo, however I can try. Those inclusions in quartz seem to me as liquid phases in form of small drops, or a ... |
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| Topic: Who is coming to Mineralientage? |
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| Riccardo Modanesi Replies: 20 Views: 31865 |
Forum: Mineral Shows Posted: Sep 24, 2023 11:55 Subject: Re: Who is coming to Mineralientage? |
| Hi to everybody!
According to someone's messages: truffles in Munich? I never heard about! If you want to eat good truffles, come to Italy! Piemonte, Umbira, Marche and Abruzzo are the regions where ... |
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