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Newest topics and users posts
07 May-23:40:44 Re: quartz twins (Herwig)
07 May-17:07:55 The mizunaka collection - smoky quartz (Am Mizunaka)
07 May-15:10:39 Re: quartz twins (Roger Warin)
07 May-14:13:54 Re: collection of michael shaw (James Catmur)
07 May-10:22:14 Re: collection of michael shaw - quartz ps. After barite (Michael Shaw)
07 May-09:39:53 Re: quartz twins (Bob Carnein)
07 May-08:22:46 Re: quartz twins (Pete Richards)
06 May-23:47:28 Re: collection of volkmar stingl (Volkmar Stingl)
06 May-15:58:27 Tricolour tourmaline from madagascar / mvm (minerals - virtual museum) collection (Jordi Fabre)
06 May-15:25:14 Re: carlos pareja photo collection (Carlos Pareja)
06 May-15:20:01 Re: carlos pareja photo collection (Carlos Pareja)
06 May-09:58:11 Re: the mim museum in beirut, lebanon (Mim Museum)
06 May-07:05:10 Re: martin danovski minerals collection (Danovskim)
05 May-22:27:21 Re: quartz twins (Bob Morgan)
05 May-16:13:09 The mizunaka collection - rhodochrosite (Am Mizunaka)
05 May-13:07:52 Elbaite (variety paraíba) from brazil / mvm (minerals - virtual museum) collection (Jordi Fabre)
05 May-12:41:15 Quartz twins (Bob Carnein)
05 May-08:26:19 Re: collection of michael shaw (Michael Shaw)
04 May-16:39:42 Brochantite from milpillas mine, mexico / mvm (minerals - virtual museum) collection (Jordi Fabre)
03 May-23:23:09 Re: collection of volkmar stingl (Volkmar Stingl)
03 May-17:21:53 Re: martin danovski minerals collection (Jordi Fabre)
03 May-11:16:02 Re: ghost dendrite (Riccardo Modanesi)
03 May-05:51:59 Re: ghost dendrite (James Catmur)
03 May-04:17:02 Re: ghost dendrite (Marco Campos-venuti)
03 May-01:35:42 Re: martin danovski minerals collection (Danovskim)

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  Topic: Pseudomorph or Epimorph of Gold?
Albert Chan

Replies: 9
Views: 17912

PostForum: Minerals and Mineralogy   Posted: Jun 02, 2011 20:48   Subject: Re: Pseudomorph or Epimorph of Gold?
Thanks, Lluís, for your input.

Regards.

Albert
  Topic: Pseudomorph or Epimorph of Gold?
Albert Chan

Replies: 9
Views: 17912

PostForum: Minerals and Mineralogy   Posted: Jun 02, 2011 11:13   Subject: Re: Pseudomorph or Epimorph of Gold?
Yes, the possibility is there (ie it is an epimorph). But I understand that only quartz is found there and I do not think that quartz crystals have such consistent striations on their faces.
Unles ...
  Topic: Pseudomorph or Epimorph of Gold?
Albert Chan

Replies: 9
Views: 17912

PostForum: Minerals and Mineralogy   Posted: Jun 02, 2011 10:40   Subject: Re: Pseudomorph or Epimorph of Gold?
Thanks, Peter, for the sketches.

I do not recall that any of my crystallized gold specimens ever has striations that cover the full crystal faces. If striations do occur, they only occur on a sm ...
  Topic: Pseudomorph or Epimorph of Gold?
Albert Chan

Replies: 9
Views: 17912

PostForum: Minerals and Mineralogy   Posted: Jun 02, 2011 08:45   Subject: Re: Pseudomorph or Epimorph of Gold?
Thanks, Mark. It IS gold indeed ! I have also carried out a specific gravity measurement on the specimen and it is 18.0 (pure gold has a specific gravity of 19.3).

By the way, only two of such ...
  Topic: Pseudomorph or Epimorph of Gold?
Albert Chan

Replies: 9
Views: 17912

PostForum: Minerals and Mineralogy   Posted: Jun 02, 2011 07:55   Subject: Pseudomorph or Epimorph of Gold?
I recently acquired two gold specimens for my collection. They came from California and were found about 30 years ago on a steep hillside of decomposed quartz. I have attached a few pictures of the ...
 
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