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04 Oct-16:42:58 The mizunaka collection - fluorapatite (Am Mizunaka)
04 Oct-15:33:40 Re: the mizunaka collection - elbaite (Am Mizunaka)
04 Oct-14:57:50 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (James Catmur)
04 Oct-13:28:01 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Peter Megaw)
04 Oct-12:51:59 Re: collection of michael shaw (Michael Shaw)
04 Oct-10:55:34 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Leofwin)
04 Oct-10:33:42 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Peter Megaw)
04 Oct-10:22:56 Re: presentation of new members - tobi (leofwin) from dresden, germany (Don Lum)
04 Oct-09:58:41 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Pete Richards)
04 Oct-09:48:00 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Leofwin)
04 Oct-09:28:52 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Lluis)
04 Oct-09:25:31 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Bob Carnein)
04 Oct-09:18:14 Dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Leofwin)
04 Oct-08:21:04 Re: munich show (mineralientage) 2022 (Tobi)
04 Oct-08:00:04 Re: presentation of new members - tobi (leofwin) from dresden, germany (Tobi)
04 Oct-06:47:48 Presentation of new members - tobi (leofwin) from dresden, germany (Leofwin)
03 Oct-23:39:50 Re: munich show (mineralientage) 2022 (Roger Warin)
03 Oct-23:19:35 Re: collection of volkmar stingl (Volkmar Stingl)
03 Oct-14:30:46 Re: collection of tobi (Carles Millan)
03 Oct-13:55:58 Re: collection of tobi (Michael Shaw)
03 Oct-12:39:21 The boldut mine - silvia's collection (Silvia)
03 Oct-12:16:00 Re: collection of tobi (Tobi)
03 Oct-12:13:45 Re: collection of tobi (Tobi)
03 Oct-12:10:54 Re: collection of tobi (James Catmur)
03 Oct-11:59:36 Re: collection of tobi (Tobi)

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  Topic: Don Lum Collection
Peter Lemkin

Replies: 1917
Views: 1675460

PostForum: Collection photos and Collector's page   Posted: Sep 19, 2022 04:04   Subject: Re: Don Lum Collection
Perhaps not many specimens, but there is actually a good amount of gold in Ireland....so nice specimens do occur, as above.

A likely source for Irish gold is placer mining in Ireland's rivers, incl ...
  Topic: Proper salinity tester when making alum crystals?
Peter Lemkin

Replies: 1
Views: 214

PostForum: Off-Topic and Introductions   Posted: Sep 18, 2022 12:20   Subject: Re: Proper salinity tester when making alum crystals?
I hate to be the bearer of bad news, but this site is about natural minerals, not man-made ones. I suggest you seek your answers on another website. Good luck.

Hello!
I am producing alum crystals, ...
  Topic: Pseudomorph chemistry
Peter Lemkin

Replies: 28
Views: 3016

PostForum: Minerals and Mineralogy   Posted: Aug 18, 2022 12:26   Subject: Re: Pseudomorph chemistry
"Superb reference"

Indeed, one of my top ten geoscience papers.
A copy is available upon request by MP.

Pseudomorphism, and more generally mineral replacement is a fascinating topic. ...
  Topic: Pseudomorph chemistry
Peter Lemkin

Replies: 28
Views: 3016

PostForum: Minerals and Mineralogy   Posted: Aug 16, 2022 16:17   Subject: Re: Pseudomorph chemistry
[quote=]
Thank you for the reply.
I have the Vink paper but my chemistry training did not include orebodies. I will try to review the paper again.
Do you remember the author and/or title of the bo ...
  Topic: Pseudomorph chemistry
Peter Lemkin

Replies: 28
Views: 3016

PostForum: Minerals and Mineralogy   Posted: Aug 14, 2022 02:34   Subject: Re: Pseudomorph chemistry
There are many papers that speak to all or part of your question. Here is one.
https://kipdf.com/stability-relations-of-malachite-and-azurite_5aee93577f8b9ac34f8b45b7.html
(link normalized by FMF)
...
  Topic: Asbestos name change
Peter Lemkin

Replies: 15
Views: 22465

PostForum: Improving the FMF Data Base of localities   Posted: Aug 04, 2022 11:51   Subject: Re: Asbestos name change
Aha....now the question becomes: What does one call the lung disease that used to be called 'asbestosis'? Val-des-Sources-RCM-osis?
  Topic: Collection of Michael Shaw
Peter Lemkin

Replies: 1839
Views: 1922610

PostForum: Collection photos and Collector's page   Posted: Jul 31, 2022 10:13   Subject: Re: Collection of Michael Shaw
This piece wouldn't win any awards for beauty - Szaibelyite is an uncommon to rare basic magnesium borate. The following sample has been in my collection since it was collected in July 1963, but just ...
  Topic: The historic Sainte-Marie-aux-Mines Show
Peter Lemkin

Replies: 50
Views: 63862

PostForum: Mineral Shows   Posted: Jul 29, 2022 00:53   Subject: Re: The historic Sainte-Marie-aux-Mines Show
"All is well that ends well...." Very strange how 'they finally saw the light' and not surprising that it was for the wrong reasons; but, "All is well that ends well...."

Part o ...
  Topic: Nature used 57 recipes to create Earth's ~10,500+ minerals!
Peter Lemkin

Replies: 1
Views: 775

PostForum: Minerals and Mineralogy   Posted: Jul 03, 2022 11:46   Subject: Re: Nature used 57 recipes to create Earth's ~10,500+ minerals!
Friday, July 01, 2022
Crushed, Zapped, Boiled, Baked and More: Nature Used 57 Recipes to Create Earth’s 10,500+ “Mineral Kinds”

Washington, DC—A 15-year study led by Carnegie’s Robert Hazen and Sh ...
  Topic: Nature used 57 recipes to create Earth's ~10,500+ minerals!
Peter Lemkin

Replies: 1
Views: 775

PostForum: Minerals and Mineralogy   Posted: Jul 03, 2022 11:31   Subject: Nature used 57 recipes to create Earth's ~10,500+ minerals!
Crushed, zapped, boiled, baked and more: Nature used 57 recipes to create Earth's 10,500-plus 'mineral kinds'

Date:
July 1, 2022
Source:
Carnegie Institution for Science
Summary:
A ...
  Topic: Quartz-diamond ..... Idk ?
Peter Lemkin

Replies: 4
Views: 1389

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jun 14, 2022 02:42   Subject: Re: Quartz-diamond ..... Idk ?
Thank you I have read that a diamond of that size would be really really rare also

Nowhere did you state the size. In the top photo of the last two, one can clearly see the face of a quartz crysta ...
  Topic: Possible high grade Osmiridium ore sample?
Peter Lemkin

Replies: 14
Views: 2050

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jun 08, 2022 08:25   Subject: Re: Possible high grade Osmiridium ore sample?
https://www.mineral-forum.com/message-board/viewtopic.php?p=19487#19487
  Topic: Possible high grade Osmiridium ore sample?
Peter Lemkin

Replies: 14
Views: 2050

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jun 08, 2022 02:58   Subject: Re: Possible high grade Osmiridium ore sample?
I'm suggesting XRD, not XRF. XRD identifies specific minerals rather than chemical constituents.

I second the idea of a university XRD. It is a whole different beast than the test you had done! Th ...
  Topic: Possible high grade Osmiridium ore sample?
Peter Lemkin

Replies: 14
Views: 2050

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jun 07, 2022 15:36   Subject: Re: Possible high grade Osmiridium ore sample?
This forum is NOT about values of minerals - no matter what they are and what they are worth or the poster thinks they are worth. Your not very subtle hint that you want to sell this for the highest p ...
  Topic: How long does it take for a crystal to form?
Peter Lemkin

Replies: 13
Views: 1726

PostForum: Minerals and Mineralogy   Posted: Jun 04, 2022 00:38   Subject: Re: How long does it take for a crystal to form?
Speaking for myself, artificial crystals, have no meaning or beauty for me. I do not collect them, although I learned about crystals in my youth growing them. Then I turned to the real thing - natural ...
  Topic: Weird Mineral, River Find
Peter Lemkin

Replies: 4
Views: 937

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jun 01, 2022 12:51   Subject: Re: Weird Mineral, River Find
If you want help with knowing what it is you will have to do some [easy/fun] work and follow the directions on the website....however, turquoise I can assure you it is not. Not only because it doesn't ...
  Topic: How long does it take for a crystal to form?
Peter Lemkin

Replies: 13
Views: 1726

PostForum: Minerals and Mineralogy   Posted: May 30, 2022 13:46   Subject: Re: How long does it take for a crystal to form?
Hi Mr. Abbasi:

You can read this interesting thread written by Peter Lemkin:


Just how fast can the crystals we love and collect grow?!


Regards.

While that article is notable for a scie ...
  Topic: How long does it take for a crystal to form?
Peter Lemkin

Replies: 13
Views: 1726

PostForum: Minerals and Mineralogy   Posted: May 30, 2022 12:09   Subject: Re: How long does it take for a crystal to form?
No simple answer, except every mineral and situation can be different. Zircon is used for dating the rock it is formed in often; some minerals form in hours to days or weeks; some of these can also gr ...
  Topic: More Label Translation
Peter Lemkin

Replies: 9
Views: 1726

PostForum: What is it? - Where is it from?   Posted: May 23, 2022 10:29   Subject: Re: More Label Translation
I don't 'really know' German, although I have to try to 'wade through it' a lot [the new variant], however, the specimen was interesting [I self-collected some that looked like that], and so I looked ...
  Topic: Is this a ruby?
Peter Lemkin

Replies: 12
Views: 1606

PostForum: What is it? - Where is it from?   Posted: May 10, 2022 06:07   Subject: Re: Is this a ruby?
So, I think the consensus is: corundum with red color = yes ; ruby = no. It is sadly usual for some to sell specimens with a 'sexier' sounding name for commercial purposes.
 
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