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Newest topics and users posts
30 Sep-01:10:01 Re: collection of volkmar stingl (Volkmar Stingl)
29 Sep-23:39:00 Re: collection of volkmar stingl (Volkmar Stingl)
29 Sep-16:33:18 Re: a mineralogical trip through italy by sante celiberti (Sante Celiberti)
29 Sep-16:20:41 Popular minerals - copper from keweenaw, michigan, usa (Jordi Fabre)
29 Sep-14:21:19 Re: favourite fluorites? (Sante Celiberti)
29 Sep-13:39:56 Re: collection of volkmar stingl (Sante Celiberti)
29 Sep-12:37:30 Re: baryte collection of niels brouwer (Niels Brouwer)
29 Sep-12:36:10 Re: favourite fluorites? (Niels Brouwer)
29 Sep-10:49:34 Re: collection of volkmar stingl (Volkmar Stingl)
29 Sep-03:18:48 Re: baryte collection of niels brouwer (Tobi)
29 Sep-03:09:19 Re: favourite fluorites? (Tobi)
29 Sep-02:28:31 Re: favourite fluorites? (James Catmur)
28 Sep-18:43:27 Re: favourite fluorites? (Niels Brouwer)
28 Sep-18:06:43 Re: a mineralogical trip through italy by sante celiberti (Sante Celiberti)
28 Sep-18:01:52 Re: baryte collection of niels brouwer (Niels Brouwer)
28 Sep-14:18:07 Popular minerals - prehnite from la combe de la selle, france (Jordi Fabre)
28 Sep-10:10:33 Re: collection of volkmar stingl (Volkmar Stingl)
28 Sep-09:48:11 Re: collection of volkmar stingl (Volkmar Stingl)
27 Sep-18:10:14 Re: a mineralogical trip through italy by sante celiberti (Sante Celiberti)
27 Sep-13:04:15 Re: collection of tobi (Tobi)
27 Sep-11:42:49 Re: what's up with minfind? (Lluis)
27 Sep-11:06:21 Re: collection of joseph d'oliveira (Joseph Doliveira)
27 Sep-10:57:45 Re: what's up with minfind? (Jesse Fisher)
27 Sep-10:49:37 Re: what's up with minfind? (Bob Kerr)
27 Sep-10:22:48 Re: collection of firmo espinar (Firmo Espinar)

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  Topic: Possible Fake: Blue Hemimorphite from Ojuela
Peter Megaw

Replies: 39
Views: 6759

PostForum: Incorrect classification and fakes   Posted: Sep 20, 2020 16:29   Subject: Re: Possible Fake: Blue Hemimorphite from Ojuela
Daniel's full report with analytical data 5-13
Sorry, forgot I could post as a single upload
  Topic: Possible Fake: Blue Hemimorphite from Ojuela
Peter Megaw

Replies: 39
Views: 6759

PostForum: Incorrect classification and fakes   Posted: Sep 20, 2020 16:23   Subject: Re: Possible Fake: Blue Hemimorphite from Ojuela
Daniel's full report with analytical data 4
  Topic: Possible Fake: Blue Hemimorphite from Ojuela
Peter Megaw

Replies: 39
Views: 6759

PostForum: Incorrect classification and fakes   Posted: Sep 20, 2020 16:22   Subject: Re: Possible Fake: Blue Hemimorphite from Ojuela
Daniel's full report with analytical data 3
  Topic: Possible Fake: Blue Hemimorphite from Ojuela
Peter Megaw

Replies: 39
Views: 6759

PostForum: Incorrect classification and fakes   Posted: Sep 20, 2020 16:22   Subject: Re: Possible Fake: Blue Hemimorphite from Ojuela
Daniel's full report with analytical data 2
  Topic: Possible Fake: Blue Hemimorphite from Ojuela
Peter Megaw

Replies: 39
Views: 6759

PostForum: Incorrect classification and fakes   Posted: Sep 20, 2020 16:21   Subject: Re: Possible Fake: Blue Hemimorphite from Ojuela
Daniel's full report with analytical data 1
  Topic: Possible Fake: Blue Hemimorphite from Ojuela
Peter Megaw

Replies: 39
Views: 6759

PostForum: Incorrect classification and fakes   Posted: Sep 20, 2020 14:22   Subject: Re: Possible Fake: Blue Hemimorphite from Ojuela
THE BLUE HEMIMORPHITES ARE FAKES! (AT LEAST SOME ARE)
Although we do not understand how the chemicals were introduced to give such a selective coating, there appears to be no question that most…if ...
  Topic: Possible Fake: Blue Hemimorphite from Ojuela
Peter Megaw

Replies: 39
Views: 6759

PostForum: Incorrect classification and fakes   Posted: Sep 01, 2020 16:54   Subject: Re: Possible Fake: Blue Hemimorphite from Ojuela
Check out the other video Jesse posted on YouTube. It's another perspective...and while you're at it check out the great music he and Joan make and post there!!
  Topic: Possible Fake: Blue Hemimorphite from Ojuela
Peter Megaw

Replies: 39
Views: 6759

PostForum: Incorrect classification and fakes   Posted: Sep 01, 2020 09:13   Subject: Re: Possible Fake: Blue Hemimorphite from Ojuela
Sorry...tried to download a video showing miners collecting the blue hemimorphite underground. Too big and the wrong file type.
  Topic: Possible Fake: Blue Hemimorphite from Ojuela
Peter Megaw

Replies: 39
Views: 6759

PostForum: Incorrect classification and fakes   Posted: Sep 01, 2020 09:12   Subject: Re: Possible Fake: Blue Hemimorphite from Ojuela
This material is being studied carefully. The blue does not wash off in water or acetone and there is a later stage of well formed calcite crystals to over 1 cm that are not blue..although some have b ...
  Topic: Please help me identify
Peter Megaw

Replies: 9
Views: 946

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Aug 23, 2020 15:10   Subject: Re: Please help me identify
Where were you picking?
  Topic: Chihuahua Trancas
Peter Megaw

Replies: 3
Views: 601

PostForum: What is it? - Where is it from?   Posted: Aug 23, 2020 14:43   Subject: Re: Chihuahua Trancas
The Trancas chalcedony geodes have several different styles...but almost all are spectacularly fluorescent under UV
  Topic: To test or not to test
Peter Megaw

Replies: 2
Views: 595

PostForum: What is it? - Where is it from?   Posted: Aug 02, 2020 11:36   Subject: Re: To test or not to test
We should be doing MUCH more testing...only way to corral C 19!!!

Oops, automatic response to your title!!! Been inside too long with no access to mineral testing faclities.

I'm with Alfredo...a ...
  Topic: Pyrargyrite, Pyrite any ideas?
Peter Megaw

Replies: 6
Views: 1071

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jul 22, 2020 08:21   Subject: Re: Pyrargyrite, Pyrite any ideas?
Massive quartz looks right, cant tell about much else. This could be a discard from one of the many vein mines in that area. If you're determined it's worth cleaning you can start with a 2 day soak i ...
  Topic: Help getting started on geology with 7 year old. New find.
Peter Megaw

Replies: 8
Views: 1065

PostForum: What is it? - Where is it from?   Posted: Jun 27, 2020 17:05   Subject: Re: Help getting started on geology with 7 year old. New find.
Your son is getting a good start...the rock on rock approach has great antiquity and pedigree. Those of us who had to stop taking geologists hammers with us because TSA took them away still resort to ...
  Topic: I think it is manmade but....
Peter Megaw

Replies: 6
Views: 1177

PostForum: What is it? - Where is it from?   Posted: Jun 21, 2020 16:31   Subject: Re: I think it is manmade but....
Slag...bubble in glass
  Topic: Museum of Natural History Wiesbaden - asking for help/info wrt special exhibition
Peter Megaw

Replies: 4
Views: 1460

PostForum: Worlwide Museums & Visits to Museums and private collections   Posted: May 25, 2020 08:25   Subject: Re: Museum of Natural History Wiesbaden - asking for help/info wrt special exhibition
Roger...currently writing an article on Naica for Min Rec so i have access to images, maps etc...historic and recent.

I also collaborate with the folks who have made the videos of the Cave of the C ...
  Topic: Agate
Peter Megaw

Replies: 2
Views: 883

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: May 21, 2020 14:43   Subject: Re: Agate
Although I do not recognize this precise agate style, I am pretty sure the label should be La Mojina, which is near Flores Magon in north central Chihuahua, right in the heart of the agate belt.
  Topic: Can somebody recommend a sweet book on Crystallography?
Peter Megaw

Replies: 13
Views: 2587

PostForum: Mineralogical Literature   Posted: May 20, 2020 17:46   Subject: Re: Can somebody recommend a sweet book on Crystallography?
Andrew, almost all books on crystallography are sweet to us...just as all babies are beautiful to their moms.

Joking aside...I do not know of a book that is laid out like your desire...you may be ...
  Topic: A different type of Mexican Geode, please tell me more.
Peter Megaw

Replies: 5
Views: 1102

PostForum: What is it? - Where is it from?   Posted: May 20, 2020 16:01   Subject: Re: A different type of Mexican Geode, please tell me more.
To be clear...Estacion Trancas is 50 to 60km ESE of LaS Choyas...the classic "coconut" geode locality Jeff wrote about.

I don't think Trancas was really on anyone's radar back then. As I ...
  Topic: A different type of Mexican Geode, please tell me more.
Peter Megaw

Replies: 5
Views: 1102

PostForum: What is it? - Where is it from?   Posted: May 20, 2020 13:38   Subject: Re: A different type of Mexican Geode, please tell me more.
This helps...as do matrix shots for other "where is it from" posts

These don't show the ribs that characterize the Zacatecas geodes...not from there

The chloritic rind and quartz style ...
 
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