We use cookies to show content based on your preferences. If you continue to browse you accept their use and installation. More information. >

FMF - Friends of Minerals Forum, discussion and message board
The place to share your mineralogical experiences

FMF English Forum is moderated by John S. White and Peter Megaw
 

Spanish message board






Newest topics and users posts
16 Nov-20:37:19 Re: unsure of mineral or stone, found in northeastern colorado (Tom Tucker)
16 Nov-18:34:09 Re: unsure of mineral or stone, found in northeastern colorado (Bob Carnein)
16 Nov-17:54:47 Re: worm casings? fossilized? (Stumptownjoe)
16 Nov-17:33:07 Re: worm casings? fossilized? (Vic Rzonca)
16 Nov-17:19:45 Re: worm casings? fossilized? (Stumptownjoe)
16 Nov-17:02:11 Re: worm casings? fossilized? (Vic Rzonca)
16 Nov-16:42:42 Re: unsure of mineral or stone, found in northeastern colorado (Sante Celiberti)
16 Nov-16:02:54 Re: worm casings? fossilized? (Stumptownjoe)
16 Nov-16:00:09 Worm casings? fossilized? (Stumptownjoe)
16 Nov-14:07:00 Re: new generation for picture - ploum (Ploum)
16 Nov-13:40:31 Re: don lum collection (Don Lum)
16 Nov-12:34:46 Re: collection of fiebre verde - chivor (#748) (Fiebre Verde)
16 Nov-12:22:22 Re: collection of philippe durand (Philippe Durand)
16 Nov-12:22:09 Re: unsure of mineral or stone , found in northeastern colorado (Bob Harman)
16 Nov-10:22:29 Re: unsure of mineral or stone , found in northeastern colorado (Jesshaley)
16 Nov-09:20:56 Re: unsure of mineral or stone , found in northeastern colorado (Kevin Conroy)
16 Nov-08:56:49 Re: unsure of mineral or stone , found in northeastern colorado (Bob Carnein)
16 Nov-08:19:53 Re: collection of tobi (Jordi Fabre)
16 Nov-08:12:53 Re: collection of tobi (Carles Millan)
16 Nov-08:08:18 Re: unsure of mineral or stone , found in northeastern coloradi (Bob Harman)
16 Nov-07:33:16 Re: unsure of mineral or stone , found in northeastern coloradi (Sante Celiberti)
16 Nov-07:15:40 Re: collection of firmo espinar (Firmo Espinar)
16 Nov-07:04:50 Re: collection of tobi (Tobi)
16 Nov-05:52:35 Re: unsure of mineral or stone , found in northeastern coloradi (Bob Harman)
16 Nov-04:45:08 Re: collection of tobi (Tobi)

For lists of newest topics and postings click here


RSS RSS

View unanswered posts

Why and how to register

Index Index
 FAQFAQ RegisterRegister  Log inLog in
 {Forgotten your password?}Forgotten your password?  

Like
59949


The time now is Nov 17, 2019 00:52

Search for a textSearch for a text   

A general guide for using the Forum with some rules and tips
Search found 108 matches
Index
Author Message
  Topic: On the mineralogy of Shijiangshan, Ulanhad League, Inner Mongolia A.R. (China)
Cesar M. Salvan

Replies: 15
Views: 21990

PostForum: Mines and Mineral Localities   Posted: May 27, 2018 19:33   Subject: Re: On the mineralogy of Shijiangshan, Ulanhad League, Inner Mongolia A.R. (China)
Completing this thread on this interesting mine. Beautiful johnbaumite specimens. In those crystals it is notorious that johnbaumite is the arsenic analog of hydroxylapatite.
A shout-out to Ed Richar ...
  Topic: Micro photos of inclusions in Quartz
Cesar M. Salvan

Replies: 106
Views: 43707

PostForum: Micros & Macros - Images of Minerals   Posted: Mar 06, 2018 19:25   Subject: Re: Micro photos of inclusions in Quartz
I do not know if it is a one-man thread, but just in case, I contribute with more photomicrography of inclusions in quartz.
  Topic: Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
Cesar M. Salvan

Replies: 17
Views: 21243

PostForum: Mines and Mineral Localities   Posted: Mar 05, 2018 11:18   Subject: Re: Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
Cesar,
Thank you for a definitive identification of this material.
Michael Shaw

My pleasure. May all the materials were as easy and fun to characterize like this. I want to extend the thanks to ...
  Topic: Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
Cesar M. Salvan

Replies: 17
Views: 21243

PostForum: Mines and Mineral Localities   Posted: Mar 04, 2018 19:42   Subject: Re: Milpillas Mine, Cuitaca, Municipio Santa Cruz, Sonora, Mexico
I update this thread, now regarding this piece published by Michael Shaw ( https://www.mineral-forum.com/message-board/viewtopic.php?p=52076#52076 )
and others published in mindat.

The story is th ...
  Topic: A new find: Hoganite from Morocco
Cesar M. Salvan

Replies: 17
Views: 9751

PostForum: Minerals and Mineralogy   Posted: Feb 28, 2018 10:08   Subject: Re: A new find: Hoganite from Morocco
I think we have to assume that they are not natural.
Indeed. I'll put it in this way:

1- If the samples were natural, it would defy what we know on the biogeochemistry of acetate. As a scientist, ...
  Topic: A new find: Hoganite from Morocco
Cesar M. Salvan

Replies: 17
Views: 9751

PostForum: Minerals and Mineralogy   Posted: Feb 26, 2018 22:25   Subject: Re: A new find: Hoganite from Morocco
To shed light on this topic and apply the Ockham's Razor to the Hoganite question, I show you the result of a very simple experiment:

Just prepare a solution with a piece of copper metal in dilute ...
  Topic: A new find: Hoganite from Morocco
Cesar M. Salvan

Replies: 17
Views: 9751

PostForum: Minerals and Mineralogy   Posted: Feb 21, 2018 21:30   Subject: Re: A new find: Hoganite from Morocco
Some months ago, I received for analysis a sample of native copper from this locality covered by crystals similar to those in discussion here. The elemental analysis showed carbon and copper, but the ...
  Topic: On the mineralogy of Shijiangshan, Ulanhad League, Inner Mongolia A.R. (China)
Cesar M. Salvan

Replies: 15
Views: 21990

PostForum: Mines and Mineral Localities   Posted: Dec 03, 2017 21:09   Subject: Re: On the mineralogy of Shijiangshan, Ulanhad League, Inner Mongolia A.R. (China)
Hi Ed,

Indeed, this interesting deposit keep yielding nice specimens of rare species and also good specimens of not so rare species. For example, it recently have been found beautiful octahedral ma ...
  Topic: An opportune harvest of Gold in Serra do Caldeirão claims, Brazil - (25)
Cesar M. Salvan

Replies: 8
Views: 10572

PostForum: Featured Columns of FMF   Posted: Aug 29, 2017 05:42   Subject: Re: An opportune harvest of Gold in Serra do Caldeirão claims, Brazil - (25)
I recently received a beautiful sample of the characteristic hopper crystals of gold from this locality with request to analyze the composition.

According to the study on the geology and metallog ...
  Topic: Cechite from Ulldemolins
Cesar M. Salvan

Replies: 6
Views: 6549

PostForum: Minerals and Mineralogy   Posted: Dec 30, 2016 05:55   Subject: Re: Cechite
...It seems to be cechite plus/on something undefined.
Maybe former Sphalerite replaced / epimorphic (or coated) by Cechite?

I don't think so. I have two hypotheses:

- A crystal of mottramite g ...
  Topic: Cechite from Ulldemolins
Cesar M. Salvan

Replies: 6
Views: 6549

PostForum: Minerals and Mineralogy   Posted: Dec 29, 2016 07:09   Subject: Re: Cechite
Photo 2016-12-28 21-25-47 certainly shows nice xx. I've collected at Vrancice and seen specimens at local Czech shows, but they were always 'black-uglies' without any euhedral xxm to my memory. I'd ha ...
  Topic: Cechite from Ulldemolins
Cesar M. Salvan

Replies: 6
Views: 6549

PostForum: Minerals and Mineralogy   Posted: Dec 28, 2016 16:11   Subject: Re: Cechite
More images of the interesting cechite with the undefined copper phase (maybe a new mineral?) from Ulldemolins.

In the samples are also present the descloizite-mottramite series, which forms green ...
  Topic: Cechite from Ulldemolins
Cesar M. Salvan

Replies: 6
Views: 6549

PostForum: Minerals and Mineralogy   Posted: Dec 26, 2016 20:37   Subject: Cechite from Ulldemolins
Cechite is a rare lead-iron vanadate, first described in samples from Alexander mine and the Posepny vein, at Vrancice (Bohemia, Czech Republic) Apart of the scarcity of the mineral, it is not very in ...
  Topic: Dry Ice
Cesar M. Salvan

Replies: 4
Views: 3901

PostForum: Off-Topic and Introductions   Posted: Dec 19, 2016 19:08   Subject: Re: Dry Ice
To the best of my knowledge, there is no naturally occurring solid carbon dioxide (dry ice) on Earth.

CO2 is a trace gas. Its importance could give the impression to the public that its concentrat ...
  Topic: Weird face in quartz
Cesar M. Salvan

Replies: 31
Views: 18174

PostForum: Minerals and Mineralogy   Posted: Nov 29, 2016 12:08   Subject: Re: Weird face in quartz
Hi Josele. May I make a suggestion to you and the administrators? There have been a number of threads about curious growth patterns and shapes in quartz. Can we not build on this thread and slightl ...
  Topic: Do people still use chemistry and fusibility?
Cesar M. Salvan

Replies: 2
Views: 2795

PostForum: Off-Topic and Introductions   Posted: Oct 28, 2016 11:39   Subject: Re: Do people still use chemistry and fusibility?
I was just skimming through my Kindle copy of F. H. Hatch's Mineralogy (1912) and noticed that a lot of mineral descriptions have things like "turns gelatinous in aqua regia and dissolves in hydr ...
  Topic: Trinitite
Cesar M. Salvan

Replies: 8
Views: 6162

PostForum: Off-Topic and Introductions   Posted: Sep 11, 2016 19:22   Subject: Re: Trinitite

I just figured the websites offering trinitite for sale might downplay any hazard in owning a sample, as they want to sell you a sample.
Since you are not trying to sell me your sample, you have no ...
  Topic: Trinitite
Cesar M. Salvan

Replies: 8
Views: 6162

PostForum: Off-Topic and Introductions   Posted: Sep 11, 2016 05:17   Subject: Re: Trinitite
Thanks, Cesar! I expected so, but was glad to read it from someone who does not have a financial interest in convincing me.
Could you PM any info on dealers I should either watch out for, or trust?
...
  Topic: Trinitite
Cesar M. Salvan

Replies: 8
Views: 6162

PostForum: Off-Topic and Introductions   Posted: Sep 08, 2016 20:43   Subject: Re: Trinitite
In my sci-fi reading, I am now going thru an Atomic War phase (Rhinehat's Long Voyage Back and Turtledove's Hot War series), which has inspired me to get myself a bit of trinitite.
I found some deale ...
  Topic: Minerals and the Origins of Life: the key roles of apatite and struvite
Cesar M. Salvan

Replies: 9
Views: 8270

PostForum: Minerals and Mineralogy   Posted: Aug 25, 2016 21:28   Subject: Re: Minerals and the Origins of Life: the key roles of apatite and struvite
Ok, no responses even to the question of Mr. Seitz on biominerals and the formal definition of mineral.
Or my writing is unintelligible and my work have not interest or I selected the wrong forum to ...
 
Page 1 of 6 Goto page 1, 2, 3, 4, 5, 6  Next
All times are GMT - 5 Hours
Jump to:  


All pictures, text, design © Forum FMF 2006-2019


Powered by FMF