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16 Aug-00:31:18 Re: collection of volkmar stingl (Volkmar Stingl)
15 Aug-20:37:17 Re: the most over-rated/overpriced species??? (Bob Carnein)
15 Aug-18:28:55 Re: peridot on lapis ??? (Origin Gems)
15 Aug-17:50:13 Re: the most over-rated/overpriced species??? (Minsur)
15 Aug-14:18:33 Sphalerite from Áliva mine, spain / #mvm (minerals - virtual museum) collection (Jordi Fabre)
15 Aug-11:36:47 Re: 19 years of bugging you (and counting!) (James Catmur)
15 Aug-11:32:59 Re: 19 years of bugging you (and counting!) (Jordi Fabre)
15 Aug-08:55:36 Re: libyan desert glass structure (Craig Hagstrom)
15 Aug-08:29:38 Re: 19 years of bugging you (and counting!) (Dany Mabillard)
14 Aug-16:27:35 Azurite and malachite from touissit, morocco / #mvm (minerals - virtual museum) collection (Jordi Fabre)
14 Aug-04:42:11 Re: 19 years of bugging you (and counting!) (Jordi Fabre)
14 Aug-03:47:07 Re: 19 years of bugging you (and counting!) (Dany Mabillard)
14 Aug-02:28:17 Re: collection from dany mabillard (Dany Mabillard)
13 Aug-18:36:13 Re: curious fluorescent metamorphic rock (Fuss)
13 Aug-16:06:12 The mizunaka collection - quartz (Am Mizunaka)
13 Aug-10:31:36 Re: collection of michael shaw (Michael Shaw)
13 Aug-08:35:48 Re: curious fluorescent metamorphic rock (Bob Carnein)
13 Aug-07:40:25 Curious fluorescent metamorphic rock (Fuss)
12 Aug-22:30:41 Re: #mvm (minerals - virtual museum) collection (Volkmar Stingl)
12 Aug-21:11:31 Re: the most over-rated/overpriced species??? (Bob Kerr)
12 Aug-16:49:24 Wulfenite from tsumeb mine, namibia / #mvm (minerals - virtual museum) collection (Jordi Fabre)
12 Aug-03:41:29 Re: collection of volkmar stingl (Volkmar Stingl)
11 Aug-16:10:47 The mizunaka collection - baryte (Am Mizunaka)
11 Aug-13:37:41 Cuprite (Silvia)
11 Aug-12:01:39 Re: the most over-rated/overpriced species??? (Roger Warin)

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  Topic: Pseudomorph or Epimorph of Gold?
Albert Chan

Replies: 9
Views: 18362

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: 18362

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: 18362

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: 18362

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: 18362

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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