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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 365 matches |
| Author | Message |
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 Topic: Peruvian / French or Cornish Chalcopyrite on Fluorite? |
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| Riccardo Modanesi Replies: 12 Views: 1036 |
 Forum: What is it? - Where is it from? Posted: Dec 29, 2021 13:41 Subject: Re: Peruvian / French or Cornish Chalcopyrite on Fluorite? |
| HI to everybody!
As a gemmologist I can say we NEVER certify the origin of a stone. Moreover, the biggest majority of gemmologists know what I think of a certification of stone origin: I mean, it's m ... |
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| Topic: Any ideas on the material appreciated |
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| Riccardo Modanesi Replies: 6 Views: 551 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Dec 29, 2021 13:07 Subject: Re: Any ideas on the material appreciated |
| Hi to everybody!
If you can cut it perfectly with a common knife and it feels soapy on your finger, it's talc; if it has different characters, it might be gypsum. Gypsum is also cut by a knife, but i ... |
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| Topic: In Memoriam - Tracy has left us |
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| Riccardo Modanesi Replies: 8 Views: 1886 |
Forum: In Memoriam Posted: Nov 07, 2021 11:14 Subject: Re: In Memoriam - Tracy has left us |
| Hi to everybody!
Really this new fell to me as a frozen shower, as we say in Italy. She was really too young to leave this world and she didn't deserve so bloody an end. My condolences to all people ... |
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| Topic: Munich Show (Mineralientage) 2021 |
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| Riccardo Modanesi Replies: 27 Views: 7044 |
Forum: News about shows Posted: Oct 13, 2021 07:47 Subject: Re: Munich Show (Mineralientage) 2021 |
| Hi to everybody!
I am already vaccinated by the second injection of AstraZeneca, I got it on June 6. Therefore I achieved my Italian green-pass, which certifies me of being vaccinated. Also, I purcha ... |
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| Topic: Northern Ireland, Ireland collecting sites |
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| Riccardo Modanesi Replies: 2 Views: 2230 |
Forum: Rockhounding trips Posted: Aug 17, 2021 04:13 Subject: Re: Northern Ireland, Ireland collecting sites |
| Hi Rgangue!
My advice is: you should look for any mineral deposit on Mindat, searching by locality. You should know that minerals likely to be found or historically found in each locality are listed ... |
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| Topic: 15 years since the beginning of FMF. As time goes! |
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| Riccardo Modanesi Replies: 19 Views: 4362 |
Forum: Comments & Suggestions Posted: Aug 10, 2021 11:05 Subject: Re: 15 years since the beginning of FMF. As time goes! |
| Hi to everybody!
It seems like yesterday to me, when Jordi proposed to me to join the Forum, and... 15 years for the Forum and almost 10 years for my joining it are already over! I had the occasion ... |
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| Topic: Stay at home - Coronavirus / Covid-19 |
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| Riccardo Modanesi Replies: 364 Views: 145994 |
Forum: National Library of Spain / Biblioteca Nacional de España (BNE) and FMF Posted: Aug 01, 2021 14:24 Subject: Re: Stay at home - Coronavirus / Covid-19 |
| Hi to everybody!
Here in Italy the European Greenpass will be compulsory starting from August 6 for travelling by train, bus, ferry etc, and for having meal in a restaurant (if you eat inside the res ... |
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| Topic: Hillman Hall of Minerals and Gems |
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| Riccardo Modanesi Replies: 9 Views: 2776 |
Forum: Other Museums in USA Posted: Jul 22, 2021 12:43 Subject: Re: Hillman Hall of Minerals and Gems |
| Hi to everybody!
These polished stones are by the biggest majority quartz. The brilliant-coloured ones (blue, pink...) are artificially enhanced by colouring. But... I'm afraid Jordi is not so enthus ... |
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| Topic: Stay at home - Coronavirus / Covid-19 |
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| Riccardo Modanesi Replies: 364 Views: 145994 |
Forum: National Library of Spain / Biblioteca Nacional de España (BNE) and FMF Posted: Jul 19, 2021 14:35 Subject: Re: Stay at home - Coronavirus / Covid-19 |
| Hi to everybody!
Here in Italy the situation has significantly improved from the point of view of victims and hospitalized people, but cases are increasing again, due to the Delta variant. Ok, let's ... |
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| Topic: Aura Coating |
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| Riccardo Modanesi Replies: 15 Views: 5302 |
Forum: Incorrect classification and fakes Posted: Jun 06, 2021 14:38 Subject: Re: Aura Coating |
| Hi to everybody!
Many years ago I was presented a fake amethyst quartz bought in Morocco by my girl-friend and her parents. I treated it with normal ethylic denaturated alcohol and... the paint got a ... |
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| Topic: Stay at home - Coronavirus / Covid-19 |
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| Riccardo Modanesi Replies: 364 Views: 145994 |
Forum: National Library of Spain / Biblioteca Nacional de España (BNE) and FMF Posted: May 30, 2021 14:57 Subject: Re: Stay at home - Coronavirus / Covid-19 |
| Hi to everybody!
Here in Italy the situation is slowly improving, TOO slowly in my opinion. I got the first inoculation (AstraZeneca) on March 14 and I should get the second one next Sunday. Then... ... |
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| Topic: A new mineral: alpha-calcium formate |
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| Riccardo Modanesi Replies: 9 Views: 3040 |
Forum: Minerals and Mineralogy Posted: May 03, 2021 12:40 Subject: Re: A new mineral: alpha-calcium formate |
| Hi to everybody!
There are plenty of minerals taking an organic or metallorganic origin: coronene, urea, whewellite, zanazziite are just some examples of them! Greetings from Italy by Riccardo. |
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| Topic: How does color treating "work"? |
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| Riccardo Modanesi Replies: 6 Views: 1584 |
Forum: Off-Topic and Introductions Posted: Apr 24, 2021 10:32 Subject: Re: How does color treating "work"? |
| Hi to everybody!
There is a lot of literature concerning gemstone treatments, like diamonds. quartzes. topazes. corundums, beryls etc. A typical case is their so- called "Maxixe-beryl, which los ... |
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| Topic: Sainte-Marie-aux-Mines 2021 cancelled |
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| Riccardo Modanesi Replies: 6 Views: 4404 |
Forum: Mineral Shows Posted: Apr 13, 2021 03:49 Subject: Re: Sainte-Marie-aux-Mines 2021 cancelled |
| Hi to everybody!
OK, let's cheer up! I got my first inoculation (AstraZeneca) on last March 14 and now I'm waiting to be called for the second one, it should be within May or early June. And let's ch ... |
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| Topic: Does Chevron Amethyst Turn Green When Heated? |
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| Riccardo Modanesi Replies: 1 Views: 1060 |
Forum: What is it? - Where is it from? Posted: Apr 01, 2021 08:14 Subject: Re: Does Chevron Amethyst Turn Green When Heated? |
| Hi to everybody!
Ok, the biggest majority of prasiolites in trade are heated or treated amethysts, as well as the biggest majority of citrines. Nevertheless, some prasiolites like the Polish (Silesia ... |
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| Topic: Natural or man-made? |
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| Riccardo Modanesi Replies: 6 Views: 2278 |
Forum: What is it? - Where is it from? Posted: Mar 13, 2021 14:15 Subject: Re: Natural or man-made? |
| Hi to everybody!
An opinion: the single pale blue/greenish pieces are natural turquoise, but I'm afraid it is a "reconstructed" one, i.e. the pieses are joined together by artificial glue o ... |
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| Topic: Any opinions? |
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| Riccardo Modanesi Replies: 4 Views: 2064 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Feb 15, 2021 14:27 Subject: Re: Any opinions? |
| I can suggest you to see the inclusions, they are decisive to see whether a gemstone is natural, synthetic or treated. I'm afraid they are at least treated, just by seeing the photos.
Greetings from ... |
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| Topic: Any opinions? |
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| Riccardo Modanesi Replies: 4 Views: 2064 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Feb 10, 2021 14:36 Subject: Re: Any opinions? |
| Hi Beau!
My advice is: you should take a manual of gemmology and see the inclusions of these gemstones by a microscope. Moreover you can take a good refractometer (I can't tell the prices here, but I ... |
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| Topic: Heat changes some minerals - how? |
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| Riccardo Modanesi Replies: 11 Views: 3152 |
Forum: Off-Topic and Introductions Posted: Jan 30, 2021 13:11 Subject: Re: Heat changes some minerals - how? |
| Dear Peter
If mineral lose water, well, maybe pickish chemist, but changed also composition, Which is one of the things Tom said that should not be.. Loosing water, reduction, oxidation are thin ... |
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| Topic: What type of mineral is this, or maybe a fossil? |
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| Riccardo Modanesi Replies: 11 Views: 3170 |
Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Jan 29, 2021 11:53 Subject: Re: What type of mineral is this, or maybe a fossil? |
| Hi to everybody!
Belemnites or some other mollusks are not to be excluded. They might be elongated shells as well! Greetings from Italy by Riccardo. |
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