FMF - Friends of Minerals Forum, discussion and message board

I didn't know Eloise, but her smile says so much.
My condolences to Joaquim and the family.

Never seen such a development.

John,
I dont share this point of view.
The Moor's head is typically at the top of the crystal.
In addition, the origin of the cations which compensate for the negative charges of the stacking of th ...

Thanks a lot Johan,
The reference looks good.
I tried to create a ResearchGate account.
The interrogation is military. I had to prove that I was the author of my publications, the first of which da ...

Very well. It's good news.
Because I believe that your photos undergo a subtle assembly that gives them this personality, like the minerality of the terroir imprints its character on the wine, withou ...

The perfection of the minerals, the excellence of the pictures.
Can we take lessons?
Roger.

Fantastique ! Merci.

Hello,

The chance of your exchanges presents me with a subject that fascinates me.
I'm not just a keen mineral collector, but also a chemist, which seems rare on the Fabre’s FMF.
I totally agree ...

Hello,

This thing is fun to watch.
If I thought like an alien, I would say, it's a chondrite...
In fact these small spheres seem glassy and set in a sort of plaster.
Am I wrong?

Hello everyone, Jesse,

Sorry, HCl has no action on this mineral.
It is difficult to do tests for hardness, etc., given the texture of the sheaves.
I nevertheless made macrophotos with the binocul ...

Hello Jesse,
Your answer sounds pretty good to me. I doubted those sheafing crystals were calcite. I will do the hydrogen chloride test.
The names of the minerals were given by the dealer.
Thank yo ...

Hello,
Here is a specimen from Malkhan, with the elbaite as a signature.
Crystals with a spindle habit are calcite.
I didn't know this deposit had any.
Is it correct ?
Don't tell me to put a drop ...

Hello,
The island of Elba is of course the type-locality of elbaite.
It still often happens that its top is black or very dark brown in color.
In France, this ending is called "Tête de Maure&q ...

Hello,
My question:
I have read that in chalcedonies and in agates, the quartz microneedles have a dimension between 50 and 100 nm.
In addition another phase of SiO2 is present = moganite (not bery ...

Hello,
Can we consider the measurement of angles between edges as long as the face is perpendicular to the axis of the lens?

Hello Alfredo, Cesar, Jordi,

Thank you for your feedback.
But I remain a real geologist at heart.
I am opposed to the extension of the nomenclature to artificial inorganic and organic species, be ...

It's an epitaxy of rutile

Hello,
A tourmaline section of Mont Ibity (Madagascar), this is not exceptional.
But this one is seen by transparency with a binocular (panoramic stacking).
I actually took this picture to "pr ...

Hello Jordi,
What amazes me is the morphology of the cubic crystal. It is typically dendritic, which corresponds to rapid crystallization. I think the man is always in a hurry.

Hello Tobi,
Your story is poignant with sincerity and passion.
Your conquest of the Mineral World is a lesson for young amateurs.
Do you authorize me to publish it (in French) in my club's magazine ...

Author	Message
Topic: In memoriam - Eloïsa Artola (Elo)
Roger Warin Replies: 5 Views: 397	Forum: In Memoriam Posted: Jun 15, 2022 14:48 Subject: Re: In memoriam - Eloïsa Artola (Elo)
Roger Warin Replies: 5 Views: 397	I didn't know Eloise, but her smile says so much. My condolences to Joaquim and the family.
Topic: The Mizunaka Collection
Roger Warin Replies: 1962 Views: 1571735	Forum: Collection photos and Collector's page Posted: Jun 13, 2022 04:14 Subject: Re: The Mizunaka Collection
Roger Warin Replies: 1962 Views: 1571735	Never seen such a development.
Topic: Elbaite, ending moor's head
Roger Warin Replies: 9 Views: 1072	Forum: Minerals and Mineralogy Posted: Jun 11, 2022 16:16 Subject: Re: Elbaite, ending moor's head
Roger Warin Replies: 9 Views: 1072	John, I dont share this point of view. The Moor's head is typically at the top of the crystal. In addition, the origin of the cations which compensate for the negative charges of the stacking of th ...
Topic: Elbaite, ending moor's head
Roger Warin Replies: 9 Views: 1072	Forum: Minerals and Mineralogy Posted: Jun 11, 2022 04:27 Subject: Re: Elbaite, ending moor's head
Roger Warin Replies: 9 Views: 1072	Thanks a lot Johan, The reference looks good. I tried to create a ResearchGate account. The interrogation is military. I had to prove that I was the author of my publications, the first of which da ...
Topic: New generation for picture - Ploum
Roger Warin Replies: 1374 Views: 1304137	Forum: Collection photos and Collector's page Posted: Jun 09, 2022 09:24 Subject: Re: New generation for picture - Ploum
Roger Warin Replies: 1374 Views: 1304137	Very well. It's good news. Because I believe that your photos undergo a subtle assembly that gives them this personality, like the minerality of the terroir imprints its character on the wine, withou ...
Topic: New generation for picture - Ploum
Roger Warin Replies: 1374 Views: 1304137	Forum: Collection photos and Collector's page Posted: Jun 09, 2022 06:36 Subject: Re: New generation for picture - Ploum
Roger Warin Replies: 1374 Views: 1304137	The perfection of the minerals, the excellence of the pictures. Can we take lessons? Roger.
Topic: New generation for picture - Ploum
Roger Warin Replies: 1374 Views: 1304137	Forum: Collection photos and Collector's page Posted: May 31, 2022 13:06 Subject: Re: New generation for picture - Ploum
Roger Warin Replies: 1374 Views: 1304137	Fantastique ! Merci.
Topic: How long does it take for a crystal to form?
Roger Warin Replies: 13 Views: 816	Forum: Minerals and Mineralogy Posted: May 30, 2022 15:33 Subject: Re: How long does it take for a crystal to form?
Roger Warin Replies: 13 Views: 816	Hello, The chance of your exchanges presents me with a subject that fascinates me. I'm not just a keen mineral collector, but also a chemist, which seems rare on the Fabre’s FMF. I totally agree ...
Topic: Need help identifying this rock
Roger Warin Replies: 10 Views: 793	Forum: FOR BEGINNERS: What is it? Where is it from? Posted: May 21, 2022 07:25 Subject: Re: Need help identifying this rock
Roger Warin Replies: 10 Views: 793	Hello, This thing is fun to watch. If I thought like an alien, I would say, it's a chondrite... In fact these small spheres seem glassy and set in a sort of plaster. Am I wrong?
Topic: Calcite in Malkhan elbaite
Roger Warin Replies: 8 Views: 654	Forum: Minerals and Mineralogy Posted: May 19, 2022 14:00 Subject: Re: Calcite in Malkhan elbaite
Roger Warin Replies: 8 Views: 654	Hello everyone, Jesse, Sorry, HCl has no action on this mineral. It is difficult to do tests for hardness, etc., given the texture of the sheaves. I nevertheless made macrophotos with the binocul ...
Topic: Calcite in Malkhan elbaite
Roger Warin Replies: 8 Views: 654	Forum: Minerals and Mineralogy Posted: May 19, 2022 00:26 Subject: Re: Calcite in Malkhan elbaite
Roger Warin Replies: 8 Views: 654	Hello Jesse, Your answer sounds pretty good to me. I doubted those sheafing crystals were calcite. I will do the hydrogen chloride test. The names of the minerals were given by the dealer. Thank yo ...
Topic: Calcite in Malkhan elbaite
Roger Warin Replies: 8 Views: 654	Forum: Minerals and Mineralogy Posted: May 18, 2022 13:56 Subject: Calcite in Malkhan elbaite
Roger Warin Replies: 8 Views: 654	Hello, Here is a specimen from Malkhan, with the elbaite as a signature. Crystals with a spindle habit are calcite. I didn't know this deposit had any. Is it correct ? Don't tell me to put a drop ...
Topic: Elbaite, ending moor's head
Roger Warin Replies: 9 Views: 1072	Forum: Minerals and Mineralogy Posted: Apr 19, 2022 04:28 Subject: Elbaite, ending moor's head
Roger Warin Replies: 9 Views: 1072	Hello, The island of Elba is of course the type-locality of elbaite. It still often happens that its top is black or very dark brown in color. In France, this ending is called "Tête de Maure&q ...
Topic: Jade, chalcedony or????
Roger Warin Replies: 7 Views: 982	Forum: FOR BEGINNERS: What is it? Where is it from? Posted: Apr 09, 2022 07:15 Subject: Re: Jade, chalcedony or????
Roger Warin Replies: 7 Views: 982	Hello, My question: I have read that in chalcedonies and in agates, the quartz microneedles have a dimension between 50 and 100 nm. In addition another phase of SiO2 is present = moganite (not bery ...
Topic: Unusual habit for Pyrite.
Roger Warin Replies: 28 Views: 2860	Forum: Minerals and Mineralogy Posted: Mar 23, 2022 09:13 Subject: Re: Unusual habit for Pyrite.
Roger Warin Replies: 28 Views: 2860	Hello, Can we consider the measurement of angles between edges as long as the face is perpendicular to the axis of the lens?
Topic: Formicaite. Beta-formicaite & alpha-Ca-formate. Mineral or not? - (39)
Roger Warin Replies: 8 Views: 1321	Forum: Featured Columns of FMF Posted: Mar 20, 2022 09:02 Subject: Re: Formicaite. Beta-formicaite & alpha-Ca-formate. Mineral or not? – (39)
Roger Warin Replies: 8 Views: 1321	Hello Alfredo, Cesar, Jordi, Thank you for your feedback. But I remain a real geologist at heart. I am opposed to the extension of the nomenclature to artificial inorganic and organic species, be ...
Topic: Unknown metallic mineral
Roger Warin Replies: 12 Views: 1277	Forum: What is it? - Where is it from? Posted: Mar 17, 2022 14:16 Subject: Re: Unknown metallic mineral
Roger Warin Replies: 12 Views: 1277	It's an epitaxy of rutile
Topic: Conoscopy of elbaite
Roger Warin Replies: 0 Views: 490	Forum: Minerals and Mineralogy Posted: Mar 14, 2022 09:19 Subject: Conoscopy of elbaite
Roger Warin Replies: 0 Views: 490	Hello, A tourmaline section of Mont Ibity (Madagascar), this is not exceptional. But this one is seen by transparency with a binocular (panoramic stacking). I actually took this picture to "pr ...
Topic: Alleged 'silvers' from Udokan?
Roger Warin Replies: 13 Views: 3804	Forum: Off-Topic and Introductions Posted: Oct 13, 2021 14:21 Subject: Re: Alleged 'silvers' from Udokan?
Roger Warin Replies: 13 Views: 3804	Hello Jordi, What amazes me is the morphology of the cubic crystal. It is typically dendritic, which corresponds to rapid crystallization. I think the man is always in a hurry.
Topic: The Tobi Martin Mineral Collection - (38)
Roger Warin Replies: 20 Views: 6453	Forum: Featured Columns of FMF Posted: Oct 10, 2021 15:01 Subject: Re: The Tobi Martin Mineral Collection - (38)
Roger Warin Replies: 20 Views: 6453	Hello Tobi, Your story is poignant with sincerity and passion. Your conquest of the Mineral World is a lesson for young amateurs. Do you authorize me to publish it (in French) in my club's magazine ...