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18 Jul-15:46:04 Re: don lum collection (Don Lum)
16 Jul-17:31:41 The mizunaka collection - chalcoalumite (Am Mizunaka)
16 Jul-12:44:28 Architectural spinel from vietnam / #mvm (minerals - virtual museum) collection (Jordi Fabre)
16 Jul-12:18:23 New book: minerals of britain and ireland 2009-2024 - a review (Jordi Fabre)
16 Jul-09:38:43 Re: collection of michael shaw (Michael Shaw)
15 Jul-13:05:10 Sphalerite with calcite from Áliva, spain / #mvm (minerals - virtual museum) collection (Jordi Fabre)
15 Jul-11:32:34 Goesdorf 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)

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  Topic: Dynamics involved in quartz forming hexagonal rings?
Donn C.

Replies: 6
Views: 8639

PostForum: Off-Topic and Introductions   Posted: Aug 14, 2022 17:07   Subject: Re: Dynamics involved in quartz forming hexagonal rings?
It’s hard to tell, but I’m not seeing actual concentric rings of Quartz, I do see the outer ring of crystal growth but the inner growth seems more randomized. That being said, I have several pieces of ...
  Topic: Dynamics involved in quartz forming hexagonal rings?
Donn C.

Replies: 6
Views: 8639

PostForum: Off-Topic and Introductions   Posted: Aug 14, 2022 13:29   Subject: Dynamics involved in quartz forming hexagonal rings?
Wondering about the crystal formation dynamics involved in Quartz crystals forming into this hexagonal ring formation??? Why do they form these rings in simple terms….. This piece has 7 rings in the ...
  Topic: Unknown crystal
Donn C.

Replies: 16
Views: 13748

PostForum: What is it? - Where is it from?   Posted: Aug 10, 2022 11:23   Subject: Re: Unknown crystal
OK, thanks everyone for the information it turned out to be an interesting little specimen..
  Topic: Unknown crystal
Donn C.

Replies: 16
Views: 13748

PostForum: What is it? - Where is it from?   Posted: Aug 10, 2022 06:29   Subject: Re: Unknown crystal
Thanks for the information on the Magma Mine Barite I think that is probably correct. I am in Arizona and the specimen was bought here in Arizona. I looked through the photos and saw a couple that l ...
  Topic: Unknown crystal
Donn C.

Replies: 16
Views: 13748

PostForum: What is it? - Where is it from?   Posted: Aug 09, 2022 22:14   Subject: Re: Unknown crystal
Hard to tell from just photos. Can you demount it and do a specific gravity?

Have no way to do that kind of test..
  Topic: Unknown crystal
Donn C.

Replies: 16
Views: 13748

PostForum: What is it? - Where is it from?   Posted: Aug 09, 2022 20:37   Subject: Unknown crystal
Need help in identifying this crystal specimen. Got it many years ago in a small collection I bought. No ID info so I just put it away until now. The crystals about about ½ inch per side. I have ...
  Topic: Negative crystals and their formation
Donn C.

Replies: 7
Views: 14302

PostForum: Minerals and Mineralogy   Posted: Feb 09, 2017 14:52   Subject: Re: Negative crystals and their formation
Yes, your negative crystal photos look very much like the negative crystals that I have in other crystals I have collected from the same Arizona location.
  Topic: Negative crystals and their formation
Donn C.

Replies: 7
Views: 14302

PostForum: Minerals and Mineralogy   Posted: Feb 09, 2017 11:32   Subject: Negative crystals and their formation
Not sure if this is the right place for this question but here it is. I ran across a negative crystal in one of the quartz crystals that I collected. I had never seen one before and it took me a whi ...
  Topic: Fluid Inclusion "Enhydro" Quartz in Arizona
Donn C.

Replies: 5
Views: 10346

PostForum: Minerals and Mineralogy   Posted: Jul 28, 2014 07:43   Subject: Re: Fluid Inclusion "Enhydro" Quartz in Arizona
Here is the enhydro quartz crystal, I have marked the bubble, it does move. About 1 inch in length
  Topic: Fluid Inclusion "Enhydro" Quartz in Arizona
Donn C.

Replies: 5
Views: 10346

PostForum: Minerals and Mineralogy   Posted: Jul 27, 2014 18:05   Subject: Fluid Inclusion "Enhydro" Quartz in Arizona
I have been doing some field collecting in Arizona recently (prior to the hot weather getting here) and have found a small quartz location that has quite a few "enhydro" quartz crystals. I ...
 
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