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Newest topics and users posts
04 Jun-20:17:45 Re: don lum collection (Don Lum)
04 Jun-15:27:00 Re: the mizunaka collection - stibnite (Am Mizunaka)
04 Jun-08:39:41 Re: collection of michael shaw - malachite (Michael Shaw)
04 Jun-01:49:14 Re: the mizunaka collection (Jordi Fabre)
03 Jun-21:44:21 The mizunaka collection - stibnite (Am Mizunaka)
03 Jun-06:16:31 Re: collection of volkmar stingl (Volkmar Stingl)
02 Jun-13:39:20 Re: don lum collection (Don Lum)
02 Jun-08:51:39 Re: collection of michael shaw (Michael Shaw)
02 Jun-02:27:53 The mizunaka collection - rhodchrosite (Am Mizunaka)
02 Jun-01:36:07 Re: collection of volkmar stingl (Volkmar Stingl)
02 Jun-01:17:41 Re: is this a rhyolite matrix with calcite and smoky quartz? (Volkmar Stingl)
01 Jun-22:11:04 Re: is this a rhyolite matrix with calcite and smoky quartz? (Roger Warin)
01 Jun-20:02:10 Re: is it possible for this specimen of hyalite to be associated with other minerals? (Alfredo)
01 Jun-10:24:08 Re: is it possible for this specimen of hyalite to be associated with other minerals? (Rick Roan)
01 Jun-10:21:30 Is malachite rare? (Matt_zukowski)
01 Jun-09:51:59 Re: is it possible for this specimen of hyalite to be associated with other minerals? (Matt_zukowski)
01 Jun-09:21:32 Re: is it possible for this specimen of hyalite to be associated with other minerals? (Rick Roan)
01 Jun-07:40:50 Re: mineral identification tips (Cascaillou)
31 May-16:04:59 Is this a rhyolite matrix with calcite and smoky quartz? (Gk68)
31 May-15:40:58 Re: don lum collection (Don Lum)
31 May-15:40:12 Re: is this dolomite-pyrite-siderite? (Gk68)
31 May-09:28:53 Re: is it possible for this specimen of hyalite to be associated with other minerals? (Rick Roan)
31 May-08:49:08 Re: is it possible for this specimen of hyalite to be associated with other minerals? (Alfredo)
31 May-07:33:18 Re: is it possible for this specimen of hyalite to be associated with other minerals? (Rick Roan)
31 May-07:26:07 Re: is it possible for this specimen of hyalite to be associated with other minerals? (James Catmur)

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  Topic: Round rocks, mineral or artifacts?
SWK

Replies: 5
Views: 4801

PostForum: What is it? - Where is it from?   Posted: Aug 30, 2021 01:06   Subject: Re: Round rocks, mineral or artifacts?
My guess is that theses are "Moqui Marbles", i.e. iron/sandstone concretions typically found in desert areas, e.g. in northern Arizona .... more info can be found on the internet




I ...
  Topic: The Mineral Collecting History of the 79 Mine, Gila County, Arizona, USA - (33)
SWK

Replies: 21
Views: 33697

PostForum: Featured Columns of FMF   Posted: Jul 23, 2020 08:59   Subject: Re: The Mineral Collecting History of the 79 Mine, Gila County, Arizona, USA - (33)
Tony, thanks for this really interesting article. Nice that you could use several of my pics .... all the best, Stephan
  Topic: Favourite Azurites?
SWK

Replies: 44
Views: 44696

PostForum: Favourite Minerals   Posted: May 25, 2020 06:15   Subject: Re: Favourite Azurites?
Azurite with Malachite from Morenci
  Topic: Favourite Azurites?
SWK

Replies: 44
Views: 44696

PostForum: Favourite Minerals   Posted: May 25, 2020 06:12   Subject: Re: Favourite Azurites?
Azurite cavity from the Copper Queen Mine, Bisbee
  Topic: Favourite Azurites?
SWK

Replies: 44
Views: 44696

PostForum: Favourite Minerals   Posted: May 25, 2020 06:09   Subject: Re: Favourite Azurites?
Azurite from the Carlota Mine, Arizona
  Topic: Favourite Azurites?
SWK

Replies: 44
Views: 44696

PostForum: Favourite Minerals   Posted: May 25, 2020 06:07   Subject: Re: Favourite Azurites?
Azurite from Blue Ball Mine in Arizona
  Topic: A mineralogical trip through the states of USA - Arizona
SWK

Replies: 87
Views: 157592

PostForum: A mineralogical trip through the states of USA   Posted: May 20, 2020 07:58   Subject: Re: A mineralogical trip through the states of USA - Arizona
Vanadinite (2 x 3.2 x 2 cm) from North Geronimo Mine, Silver District, Trigo Mountains, La Paz County, Arizona (Pure Potential Claim) (own specimen & photo, formerly Bob Kerr collection)
  Topic: A mineralogical trip through the states of USA - Arizona
SWK

Replies: 87
Views: 157592

PostForum: A mineralogical trip through the states of USA   Posted: May 20, 2020 07:51   Subject: Re: A mineralogical trip through the states of USA - Arizona
Dioptase with Cerussite (3 x 3.5 x 2 cm) from Mammoth-St. Anthony Mine, St. Anthony deposit, Tiger, Mammoth District, Pinal County, Arizona (Mammoth-St Anthony Mine; Mammoth Mine; St. Anthony Mine) (m ...
  Topic: A mineralogical trip through the states of USA - Arizona
SWK

Replies: 87
Views: 157592

PostForum: A mineralogical trip through the states of USA   Posted: May 20, 2020 07:45   Subject: Re: A mineralogical trip through the states of USA - Arizona
Native Silver (2.5 cm x 3.5 cm x 2 cm) from Silver King Mine (Silver King Mining Co. property; Fortune Mine; California Mine; White Horse Mine; Seventy-Four Mine; Last Chance Mine), Comstock Wash, Kin ...
  Topic: Presentation of new members - Reference Thread
SWK

Replies: 501
Views: 579564

PostForum: Off-Topic and Introductions   Posted: Sep 21, 2019 10:13   Subject: Re: Presentation of new members - Stephan W. Koch mostly in Tucson
Hi Tobi,

thanks for your mail. It could well be that we have met ... I work here at the University and am involved with the Freunde des Mineralienmuseus etc....

Best, Stephan
  Topic: Presentation of new members - Reference Thread
SWK

Replies: 501
Views: 579564

PostForum: Off-Topic and Introductions   Posted: Sep 21, 2019 08:38   Subject: Presentation of new members - Stephan W. Koch mostly in Tucson
Hi,

my name is Stephan W Koch. Since there is already an active member with the name "Stefan Koch", I decided to use SWK as contact rather than my full name.

My wife and I spend part t ...
 
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