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Newest topics and users posts
15 Jul-13:05:10 Sphalerite with calcite from Áliva, spain / #mvm (minerals - virtual museum) collection (Jordi Fabre)
15 Jul-11:32:34 Goersdorf mine (luxembourg) antimony (Roger Warin)
14 Jul-18:03:59 Malachite after azurite on goethite (Silvia)
14 Jul-16:43:05 The mizunaka collection - quartz (Am Mizunaka)
14 Jul-09:34:45 Re: collection of michael shaw (Michael Shaw)
13 Jul-12:19:45 Lazurite (lapis lazuli) from afghanistan / #mvm (minerals - virtual museum) collection (Jordi Fabre)
12 Jul-23:04:14 Re: collection of volkmar stingl (Volkmar Stingl)
12 Jul-09:00:56 Re: the mim museum in beirut, lebanon (Mim Museum)
12 Jul-06:59:21 Re: collection from dany mabillard (Dany Mabillard)
12 Jul-00:49:24 Re: are there pyrite balls found in verzino? (Herwig)
12 Jul-00:25:14 Re: are there pyrite balls found in verzino? (Roger Warin)
12 Jul-00:08:38 Re: are there pyrite balls found in verzino? (Roger Warin)
11 Jul-17:36:07 The mizunaka collection - fluorite (Am Mizunaka)
11 Jul-14:14:25 Re: slice schalenblende (Mathias)
11 Jul-14:08:21 Re: czech rockhounding adventures – agates & amethysts (Stoner)
11 Jul-08:12:55 Czech rockhounding adventures – agates & amethysts (Stoner)
11 Jul-08:03:52 Re: are there pyrite balls found in verzino? (James Catmur)
11 Jul-02:33:28 Re: collection of michael shaw (Michael Shaw)
11 Jul-00:24:28 Re: collection of volkmar stingl (Volkmar Stingl)
10 Jul-13:46:07 Re: are there pyrite balls found in verzino? (Dany Mabillard)
10 Jul-13:45:53 Veszelyite from sanguozhuang, china / #mvm (minerals - virtual museum) collection (Jordi Fabre)
09 Jul-15:45:27 Re: caldbeck fell trip (Roy Starkey)
09 Jul-10:02:30 Re: caldbeck fell trip (Forrestblyth)
09 Jul-09:41:21 Caldbeck fell trip (Forrestblyth)
08 Jul-13:17:38 Re: stellerite specimens from piedra parada, mexico (John Betts)

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The information provided within this Forum about localities is only given to allow reference to them. Any visit to any of the localities requires you to obtain full permission and relevant information prior to your visit. FMF is strictly against any illicit activities related to collecting minerals.
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  Topic: cristobalite vs chalcedony in thin section
Peter Megaw

Replies: 16
Views: 21903

PostForum: Minerals and Mineralogy   Posted: Apr 08, 2025 09:08   Subject: Re: cristobalite vs chalcedony in thin section
Robert Folk taught that length-slow chalcedony was indicative of formation under evaporitic or sulfate rich conditions. If you have a gyp plate you could check that out
  Topic: "Geode" Mineral Identification
Peter Megaw

Replies: 15
Views: 11294

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Mar 04, 2025 15:16   Subject: Re: "Geode" Mineral Identification
This does not look like any of the geodes from Chihuahua...most of them fluoresce brilliant yellow-green from uranyl activation.

The lumpiness and carbonate rind suggest something more like a " ...
  Topic: Stellerite specimens from Piedra Parada, Mexico
Peter Megaw

Replies: 8
Views: 5222

PostForum: Minerals and Mineralogy   Posted: Feb 21, 2025 10:05   Subject: Re: Stellerite specimens from Piedra Parada, Mexico
Raman work at the UA several years ago identified stellerite, stilbite, heulandite, chabazite, clinoptilolite and related species from the complex zeolite coatings over smoky quartz and feldspar pegma ...
  Topic: Locality clarification or where is it from?
Peter Megaw

Replies: 8
Views: 4148

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Dec 31, 2024 13:02   Subject: Re: Locality clarification or where is it from?
Geographically that is correct...but geologically Illinois is closer to Elmwood (MVT sensu latu) than Mexico (CRD). That red sphalerite is a good sign of MVT
  Topic: Locality clarification or where is it from?
Peter Megaw

Replies: 8
Views: 4148

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Dec 29, 2024 14:45   Subject: Re: Locality clarification or where is it from?
There are a lot of possible sources based on the fluorite shape and color...but the matrix looks wrong for Ojuela. I think the red is not a coating but actually makes up the matrix as a layered granu ...
  Topic: Lego Rhodochrosite, Amethyst Geode, Black Tourmaline with Aquamarine, Orange Quartz, Emera
Peter Megaw

Replies: 10
Views: 8056

PostForum: Minerals and Mineralogy   Posted: Nov 21, 2024 09:48   Subject: Re: Lego Rhodochrosite, Amethyst Geode, Black Tourmaline with Aquamarine, Orange Quartz, E
Lego says it is not official yet, so cannot be displayed until it is
  Topic: Lego Rhodochrosite, Amethyst Geode, Black Tourmaline with Aquamarine, Orange Quartz, Emera
Peter Megaw

Replies: 10
Views: 8056

PostForum: Minerals and Mineralogy   Posted: Nov 20, 2024 13:47   Subject: Re: Lego Rhodochrosite, Amethyst Geode, Black Tourmaline with Aquamarine, Orange Quartz, E
Does anyone know how to get ahold of the guy/gal behind this?
Make a great exhibit for TGMS
  Topic: Where is this amethyst from?
Peter Megaw

Replies: 4
Views: 2598

PostForum: What is it? - Where is it from?   Posted: Nov 06, 2024 10:46   Subject: Re: Where is this amethyst from?
clearly from a vein deposit. ...very likely Guanajuato, Mexico
  Topic: Galena from Hiendelaencina
Peter Megaw

Replies: 8
Views: 4147

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Oct 02, 2024 10:46   Subject: Re: Galena from Hiendelaencina
With those overgrowths it looks more like Tri-State/Old Lead Belt (Kansas?) rather than Viburnum. Doesn't look right for the Baxter Mine, but possibly ha neighborhood
  Topic: An interesting Colorado "Gold Specimen" Story
Peter Megaw

Replies: 1
Views: 6109

PostForum: Incorrect classification and fakes   Posted: Jun 19, 2024 10:14   Subject: Re: An interesting Colorado "Gold Specimen" Story
Great piece Bob...I think I can fill a few gaps in the story...

Shortly after I first moved to Tucson in 1979, Richard opened Bideaux Minerals on the north side of Miracle Mile, just west of the Gh ...
  Topic: In memoriam - George Robinson, a man of science, passed away
Peter Megaw

Replies: 3
Views: 6742

PostForum: In Memoriam   Posted: Apr 23, 2024 17:44   Subject: Re: In memoriam - George Robinson, a man of science, passed away
Knew George for many years...still have a cute Thunder Bay amethyst I got from them back when they were digging and dealing.

Didn't know about the Ragtime though...LOVE it!

One by one time mar ...
  Topic: Locality?
Peter Megaw

Replies: 5
Views: 4827

PostForum: What is it? - Where is it from?   Posted: Apr 14, 2024 07:32   Subject: Re: Locality?
Ask Bill Dameron...Barite Bill!
  Topic: Are there any big mineral shows in canada?
Peter Megaw

Replies: 5
Views: 7376

PostForum: Mineral Shows   Posted: Mar 10, 2024 09:15   Subject: Re: Are there any big mineral shows in canada?
Biggest I know of is the Bancroft Show....lots of self collectors
  Topic: Fluorite locality
Peter Megaw

Replies: 6
Views: 5050

PostForum: What is it? - Where is it from?   Posted: Feb 16, 2024 18:53   Subject: Re: Fluorite locality
Agreed...the calcite on the fluorite and the character of the sphalerite matrix scream Elmwood
  Topic: Can anyone tell me if this is Stellar Beam Calciite?
Peter Megaw

Replies: 8
Views: 5805

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Feb 14, 2024 18:34   Subject: Re: Can anyone tell me if this is Stellar Beam Calciite?
Agreed on the silliness Alfredo!...but I couldn't resist Googling "Stellar Beam Calcite". All hocus-pocus aside that term appears to apply to calcite from Elmwood, so this piece qualifies. ...
 
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