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Newest topics and users posts
20 Jan-17:07:01 Re: silvia's collection (Bergur_e_sigurdarson)
20 Jan-17:01:45 Re: forms involved in titanite crystal (Bergur_e_sigurdarson)
20 Jan-16:49:26 Romanian tetrahedrite - silvia's collection (Silvia)
20 Jan-16:22:37 Re: forms involved in titanite crystal (Mark Holtkamp)
20 Jan-14:53:45 Re: forms involved in titanite crystal (Josele)
20 Jan-13:20:26 Re: forms involved in titanite crystal (Pete Richards)
20 Jan-13:10:05 Re: using iron and iron oxide as a green fuel (Aniol Soler)
20 Jan-12:59:30 Re: don lum collection (Don Lum)
20 Jan-12:04:50 Re: using iron and iron oxide as a green fuel (James Catmur)
20 Jan-11:27:44 Re: using iron and iron oxide as a green fuel (Alfredo)
20 Jan-10:53:44 Using iron and iron oxide as a green fuel (James Catmur)
20 Jan-10:52:34 Forms involved in titanite crystal (Josele)
19 Jan-19:59:52 Re: don lum collection (Don Lum)
19 Jan-18:16:47 Re: don lum collection (Silvia)
19 Jan-18:12:54 Re: collection of firmo espinar (Firmo Espinar)
19 Jan-17:32:32 Re: collection of sante celiberti (Sante Celiberti)
19 Jan-16:44:03 Re: collection of sante celiberti (Sante Celiberti)
19 Jan-14:32:31 Re: don lum collection (Don Lum)
19 Jan-14:01:25 Re: tucson shows 2022 (Bob Kerr)
19 Jan-13:29:05 Re: new generation for picture - ploum (Jose Luis Jara Jara)
19 Jan-13:00:20 Re: new generation for picture - ploum (Ploum)
18 Jan-18:36:38 The mizunaka collection - smoky quartz (Am Mizunaka)
18 Jan-17:35:15 Re: don lum collection (Don Lum)
18 Jan-11:27:14 Re: collection of ras (Robert Seitz)
18 Jan-09:50:00 Re: collection of michael shaw - ilvaite (Michael Shaw)

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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: Peruvian / French or Cornish Chalcopyrite on Fluorite?
Riccardo Modanesi

Replies: 12
Views: 1036

PostForum: 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 ...
  Topic: Any ideas on the material appreciated
Riccardo Modanesi

Replies: 6
Views: 551

PostForum: 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 ...
  Topic: In Memoriam - Tracy has left us
Riccardo Modanesi

Replies: 8
Views: 1886

PostForum: 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 ...
  Topic: Munich Show (Mineralientage) 2021
Riccardo Modanesi

Replies: 27
Views: 7044

PostForum: 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 ...
  Topic: Northern Ireland, Ireland collecting sites
Riccardo Modanesi

Replies: 2
Views: 2230

PostForum: 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 ...
  Topic: 15 years since the beginning of FMF. As time goes!
Riccardo Modanesi

Replies: 19
Views: 4362

PostForum: 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 ...
  Topic: Stay at home - Coronavirus / Covid-19
Riccardo Modanesi

Replies: 364
Views: 145994

PostForum: 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 ...
  Topic: Hillman Hall of Minerals and Gems
Riccardo Modanesi

Replies: 9
Views: 2776

PostForum: 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 ...
  Topic: Stay at home - Coronavirus / Covid-19
Riccardo Modanesi

Replies: 364
Views: 145994

PostForum: 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 ...
  Topic: Aura Coating
Riccardo Modanesi

Replies: 15
Views: 5302

PostForum: 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 ...
  Topic: Stay at home - Coronavirus / Covid-19
Riccardo Modanesi

Replies: 364
Views: 145994

PostForum: 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... ...
  Topic: A new mineral: alpha-calcium formate
Riccardo Modanesi

Replies: 9
Views: 3040

PostForum: 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.
  Topic: How does color treating "work"?
Riccardo Modanesi

Replies: 6
Views: 1584

PostForum: 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 ...
  Topic: Sainte-Marie-aux-Mines 2021 cancelled
Riccardo Modanesi

Replies: 6
Views: 4404

PostForum: 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 ...
  Topic: Does Chevron Amethyst Turn Green When Heated?
Riccardo Modanesi

Replies: 1
Views: 1060

PostForum: 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 ...
  Topic: Natural or man-made?
Riccardo Modanesi

Replies: 6
Views: 2278

PostForum: 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 ...
  Topic: Any opinions?
Riccardo Modanesi

Replies: 4
Views: 2064

PostForum: 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 ...
  Topic: Any opinions?
Riccardo Modanesi

Replies: 4
Views: 2064

PostForum: 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 ...
  Topic: Heat changes some minerals - how?
Riccardo Modanesi

Replies: 11
Views: 3152

PostForum: 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 ...
  Topic: What type of mineral is this, or maybe a fossil?
Riccardo Modanesi

Replies: 11
Views: 3170

PostForum: 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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