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Newest topics and users posts
06 Dec-12:44:03 Re: collection of michael shaw (Michael Shaw)
06 Dec-01:43:16 Re: favourite mineral species/families? (Roger Warin)
05 Dec-10:05:40 Re: don lum collection (Don Lum)
05 Dec-08:40:26 Re: collection of firmo espinar (Firmo Espinar)
05 Dec-04:05:01 The mizunaka collection - smoky quartz (Am Mizunaka)
05 Dec-03:01:11 Re: don lum collection (Tobi)
04 Dec-17:14:12 Re: don lum collection (Don Lum)
04 Dec-12:01:14 Re: favourite mineral species/families? (Philippe Durand)
04 Dec-11:41:53 Re: favourite mineral species/families? (Bob Kerr)
04 Dec-11:05:35 Re: favourite mineral species/families? (Michael Shaw)
04 Dec-11:02:16 Re: collection of michael shaw (Michael Shaw)
04 Dec-03:42:22 Re: favourite mineral species/families? (Tobi)
04 Dec-01:01:59 Re: collection of volkmar stingl (Volkmar Stingl)
03 Dec-20:39:46 Re: help with locality (Michael Shaw)
03 Dec-17:37:31 The mizunaka collection - rhodochrosite (Am Mizunaka)
03 Dec-16:29:57 Re: help with locality (Bob Kerr)
03 Dec-16:12:41 Help with locality (Michael Shaw)
03 Dec-10:13:33 Re: collection of tobi (Tobi)
03 Dec-09:09:28 Re: collection of tobi (Tobi)
02 Dec-16:26:37 Re: new generation for picture - ploum (Ploum)
02 Dec-10:20:36 Re: collection of xiao-dong (James Catmur)
02 Dec-09:44:52 Re: collection of michael shaw (Michael Shaw)
02 Dec-09:18:51 Re: collection of xiao-dong (Xdxucn)
02 Dec-05:29:03 The mizunaka collection - quartz (Am Mizunaka)
01 Dec-18:55:26 The mizunaka collection - petrified wood (Am Mizunaka)

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  Topic: Find of Wulfenite in the El Centenillo mine, Granada
John S. White

Replies: 1
Views: 584

PostForum: Mines and Mineral Localities   Posted: Oct 13, 2022 07:42   Subject: Re: Find of Wulfenite in the El Centenillo mine, Granada
Indeed the photos are great. Very nice.
  Topic: Could it be a fulgurite?
John S. White

Replies: 3
Views: 721

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Sep 29, 2022 11:04   Subject: Re: Could it be a fulgurite?
I believe it could be a fulgurite. With this type of fulgurite the glass would be in the center, surrounded by grains of sand. However, if the center is solid glass the object should be relatively ...
  Topic: Question about Rutile, Brookite and Anatase
John S. White

Replies: 4
Views: 1568

PostForum: Minerals and Mineralogy   Posted: Jul 21, 2022 20:54   Subject: Re: question about rutile, brookite and anatase
I am not sure that the reference to "why they crystallized differently" is really going to help Paul better understand polymorphs. At least two of the three (or more) titanium dioxide miner ...
  Topic: Twinned Topaz?
John S. White

Replies: 8
Views: 2446

PostForum: What is it? - Where is it from?   Posted: Jul 01, 2022 13:56   Subject: Re: Twinned Topaz?
I had a topaz in my collection that I wanted so much to be a twin but I could find no reference to topaz twinning in that direction or, in fact, in any direction so I had to conclude that topaz does n ...
  Topic: More Label Translation
John S. White

Replies: 9
Views: 2113

PostForum: What is it? - Where is it from?   Posted: May 22, 2022 13:15   Subject: Re: More Label Translation
Make that Melanson.


Correction made.
MGS
  Topic: Need help identifying this rock
John S. White

Replies: 10
Views: 1886

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: May 19, 2022 14:30   Subject: Re: Need help identifying this rock
Sorry Bob but I feel that leaving behind a rock or mineral sample that has no relationship to the geological environment where you left it is a very poor idea.
  Topic: Need help identifying this rock
John S. White

Replies: 10
Views: 1886

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: May 18, 2022 14:26   Subject: Re: Need help identifying this rock
I tend to agree with Alfredo but at the very least you can tell us where this canyon is located. Such information might often be critical.
  Topic: Elbaite, ending moor's head
John S. White

Replies: 9
Views: 2303

PostForum: Minerals and Mineralogy   Posted: Apr 19, 2022 10:49   Subject: Re: Elbaite, ending moor's head
A quick answer is that a tourmaline crystal, as it is growing, selectively chooses different elements from what is available to incorporate as it grows. An easy example are the common tourmalines wit ...
  Topic: Spherical inclusions in amethyst - cristobalite? vs fluorite
John S. White

Replies: 15
Views: 3338

PostForum: Minerals and Mineralogy   Posted: Mar 28, 2022 10:15   Subject: Re: Spherical inclusions in amethyst - cristobalite?
I no longer have these crystals but I do have a photo of the pair. Attached here is a photo of two amethysts from Brazil, one with many spheres totally included and another with a sphere on the surfa ...
  Topic: Tucson Shows 2022
John S. White

Replies: 95
Views: 38447

PostForum: News about shows   Posted: Jan 27, 2022 10:52   Subject: Re: Tucson Shows 2022
I would just like to thank Bob Kerr for his excellent coverage of a lot of what is new in Tucson this year. Unfortunately, I will miss the show out of concerns over Omicron, so Bob's postings help.
  Topic: In Memoriam: Charlie Key
John S. White

Replies: 5
Views: 2621

PostForum: In Memoriam   Posted: Dec 30, 2021 07:37   Subject: Re: In Memoriam: Charlie Key
A photo from a very memorable session in 2014 with Charles in Tucson.
  Topic: In Memoriam: Charlie Key
John S. White

Replies: 5
Views: 2621

PostForum: In Memoriam   Posted: Dec 28, 2021 06:32   Subject: Re: In Memoriam: Charlie Key
Charles was a very dear friend. The Walkers stated very well what it was that made him special. This is a great loss to the mineral community.
  Topic: In Memoriam - Tracy has left us
John S. White

Replies: 8
Views: 3730

PostForum: In Memoriam   Posted: Nov 08, 2021 10:05   Subject: Re: In Memoriam - Tracy has left us
I would have written this much sooner but I was waiting to receive more information about Tracy's truly surprising and unfortunate passing. I am still waiting so I do not want to wait any longer. Ap ...
  Topic: James Madison University Mineral Museum
John S. White

Replies: 0
Views: 1886

PostForum: Minerals and Mineralogy   Posted: Nov 07, 2021 10:19   Subject: James Madison University Mineral Museum
What follows is a report about a celebration written by my very good friend from Baltimore, Maryland, Jake Slagle. Jake started a blog about minerals in 2009 ( http://mineralbliss.blogspot.com ) and h ...
  Topic: Reminiscences of a Mineralogist by Arthur Montgomery
John S. White

Replies: 2
Views: 2969

PostForum: Mineralogical Literature   Posted: Apr 08, 2021 17:25   Subject: Re: Reminiscences of a Mineralogist by Arthur Montgomery
As the founder of the journal The Mineralogical Record I should point out that Dr. Montgomery was instrumental in the founding of the Record. He personally financed the start of the journal and witho ...
  Topic: Reminiscences of a Mineralogist by Arthur Montgomery
John S. White

Replies: 2
Views: 2969

PostForum: Mineralogical Literature   Posted: Apr 07, 2021 04:22   Subject: Reminiscences of a Mineralogist by Arthur Montgomery
Marie Huizing, the editor of Rocks & Minerals, very kindly agreed to publish the original version of this letter in that journal. And Jordi has generously agreed to allow me to post a similar ver ...
  Topic: Natural or man-made?
John S. White

Replies: 6
Views: 3309

PostForum: What is it? - Where is it from?   Posted: Mar 13, 2021 09:24   Subject: Re: Natural or man-made?
It is nearly impossible to tell natural vs. manmade from photos, even very good ones like yours. However in my opinion I have to say that your turquoise pendant appears very natural.
  Topic: Hester Diamond Auction
John S. White

Replies: 11
Views: 7537

PostForum: Mineral Shows   Posted: Jan 25, 2021 10:18   Subject: Re: Hester Diamond Auction
Perhaps you can fault her curator John Trinchillo
  Topic: Pyrite with bubble-like growths
John S. White

Replies: 21
Views: 10810

PostForum: Minerals and Mineralogy   Posted: Jan 03, 2021 06:06   Subject: Re: Pyrite with bubble-like growths
This may not be the same phenomenon but viewers may find it interesting just the same. The termination of a fluorapatite crystal from Panasqueira, Portugal. 4 cm across.
  Topic: Proposed new system for classifying minerals
John S. White

Replies: 15
Views: 8008

PostForum: Minerals and Mineralogy   Posted: Dec 28, 2020 14:43   Subject: Re: Proposed new system for classifying minerals
I, for one, find it hard to contain my skepticism, especially in the absence of some examples of what minerals in such a system would look like. I feel sure that if a survey were taken of all who can ...
 
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