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Newest topics and users posts
10 Apr-03:54:53 Re: new generation for picture - ploum (Ploum)
09 Apr-23:26:53 Re: collection of volkmar stingl (Volkmar Stingl)
09 Apr-23:16:20 Re: new generation for picture - ploum (Volkmar Stingl)
09 Apr-18:17:38 Re: new generation for picture - ploum (Bob Kerr)
09 Apr-17:10:19 The mizunaka collection - quartz (Am Mizunaka)
09 Apr-14:46:48 Re: collection of sante celiberti (Sante Celiberti)
09 Apr-14:10:28 Re: new generation for picture - ploum (Ploum)
09 Apr-13:55:32 Re: the mizunaka collection - quartz (Am Mizunaka)
09 Apr-10:48:20 Re: collection of jean suffert (Jean Suffert)
09 Apr-10:26:51 Re: melanophlogite? (Luiz Oliveira)
09 Apr-09:17:14 Re: collection of ras (Robert Seitz)
09 Apr-03:58:04 Re: collection of carles millan (Carles Millan)
09 Apr-03:53:36 Re: collection of jean suffert (Tobi)
09 Apr-03:49:24 Re: collection of annemieke en rob schnerr (Tobi)
09 Apr-03:45:40 Re: collection of ras (Tobi)
09 Apr-03:43:29 Re: when does the passion for minerals become an addiction? (Tobi)
09 Apr-03:23:17 Re: the mizunaka collection - quartz (Tobi)
09 Apr-03:16:54 Re: collection of carles millan (Tobi)
09 Apr-03:03:22 Re: new generation for picture - ploum (Tobi)
08 Apr-18:22:40 Re: reminiscences of a mineralogist by arthur montgomery (David K. Joyce)
08 Apr-17:25:30 Re: reminiscences of a mineralogist by arthur montgomery (John S. White)
08 Apr-15:23:40 Re: new generation for picture - ploum (Firmo Espinar)
08 Apr-13:23:02 Re: collection of carles millan (Carles Millan)
08 Apr-11:11:08 Re: collection of carles millan (Michael Shaw)
08 Apr-03:49:22 Collection of carles millan - wulfenite from mexico (Carles Millan)

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  Topic: Quartz, Natural and Synthetic
Mark Ost

Replies: 47
Views: 77143

PostForum: Minerals and Mineralogy   Posted: Feb 20, 2015 16:56   Subject: Re: Quartz, Natural and Synthetic
The synthetic quartz is quite spectacular. I see no problem as long as they are labeled as such. Frankly I would be happy to have such nice work and would value it no less, perhaps a bit more perchanc ...
  Topic: 2015 Tucson In Retrospect
Mark Ost

Replies: 61
Views: 81689

PostForum: News about shows   Posted: Feb 20, 2015 11:05   Subject: Re: 2015 Tucson In Retrospect
Fishite? Fresh water variety I think.
  Topic: Collection of Mark Ost
Mark Ost

Replies: 66
Views: 59731

PostForum: Collection photos and Collector's page   Posted: Feb 17, 2015 18:02   Subject: Re: Collection of Mark Ost
A former Jan Buma collection fluorite from Namibia, mounted on form cut stand with natural wood support. Here are the construction steps and final product.
  Topic: Collection of Mark Ost
Mark Ost

Replies: 66
Views: 59731

PostForum: Collection photos and Collector's page   Posted: Feb 17, 2015 17:52   Subject: Collection of Mark Ost
It has been a while since I have updated some of my recent acquisitions. Here is a micro photo of wire silver on acanthite from China.
  Topic: What should I buy to start testing what Rocks/minerals i have
Mark Ost

Replies: 8
Views: 7602

PostForum: Minerals and Mineralogy   Posted: Feb 07, 2015 19:47   Subject: Re: What should I buy to start testing what Rocks/minerals i have
Ah that explains a lot about your profile picture Pete. You thought that was the cat in your hands! I was wondering about the curious expression.
  Topic: What should I buy to start testing what Rocks/minerals i have
Mark Ost

Replies: 8
Views: 7602

PostForum: Minerals and Mineralogy   Posted: Feb 07, 2015 17:23   Subject: Re: What should I buy to start testing what Rocks/minerals i have
Another very good guide is the Simon and Schuster's "Guide to Rocks and Minerals". This is one of the best field guides in my opinion for the new collector. It has very complete information ...
  Topic: Collection of Doug Merson
Mark Ost

Replies: 156
Views: 124282

PostForum: Collection photos and Collector's page   Posted: Feb 07, 2015 17:06   Subject: Re: Collection of Doug Merson
Very nice photographic work! Thanks for sharing
  Topic: What makes calcite white vs. colorless?
Mark Ost

Replies: 6
Views: 7844

PostForum: Minerals and Mineralogy   Posted: Feb 06, 2015 18:25   Subject: Re: what makes calcite White vs. colorless?
No the two don't correlate. Degree of "cystallinity" is a term we don't use. The color transmission, refraction or reflection is more complex than the degree of order in a matirx. Though imp ...
  Topic: What makes calcite white vs. colorless?
Mark Ost

Replies: 6
Views: 7844

PostForum: Minerals and Mineralogy   Posted: Feb 06, 2015 09:34   Subject: Re: what makes calcite White vs. colorless?
Well I am not so sure I rank under smart people here but color can be caused by the atomic arrangement of elements in the crystal structure or it can be caused by impurities and inclusions during min ...
  Topic: Hand Lenses
Mark Ost

Replies: 17
Views: 25895

PostForum: Off-Topic and Introductions   Posted: Jan 22, 2015 15:19   Subject: Re: Hand Lenses
Do they make a diamond encrusted model? I want to be able to walk into Tiffany's and do a decent impression....................................
  Topic: Food safe water rocks for PH balancing drinking water
Mark Ost

Replies: 8
Views: 10566

PostForum: Off-Topic and Introductions   Posted: Jan 18, 2015 09:04   Subject: Re: Food safe water rocks for PH balancing drinking water
in a cow perhaps
  Topic: Food safe water rocks for PH balancing drinking water
Mark Ost

Replies: 8
Views: 10566

PostForum: Off-Topic and Introductions   Posted: Jan 18, 2015 08:07   Subject: Re: Food safe water rocks for PH balancing drinking water
Man Josele
That is one big kidney stone. Maybe take it to Tucson? Oh I am sick!
  Topic: Food safe water rocks for PH balancing drinking water
Mark Ost

Replies: 8
Views: 10566

PostForum: Off-Topic and Introductions   Posted: Jan 17, 2015 05:42   Subject: Re: Food safe water rocks for PH balancing drinking water
Oh seriously, a bit of caution. Many rocks are porous and are great at absorbing whatever goes into them such as Benzene, petroleum products, Volatile chemicals and so on; whatever may be out there. ...
  Topic: Food safe water rocks for PH balancing drinking water
Mark Ost

Replies: 8
Views: 10566

PostForum: Off-Topic and Introductions   Posted: Jan 16, 2015 20:28   Subject: Re: Food safe water rocks for PH balancing drinking water
Well this is a bit different. Maybe baking soda or lemon might be better? Easier anyways.
  Topic: Honoring past collectors
Mark Ost

Replies: 14
Views: 49940

PostForum: Honoring past collectors   Posted: Jan 13, 2015 09:02   Subject: Re: Honoring past collectors
I also like this idea. The minerals will stay long after all of us are gone, so ownership is a fleeting and ultimately false idea. Each one of us is but a temporary caretaker. The real value of the mi ...
  Topic: 2014 Graphic Excellence Award again for the Mineralogical Record and two more medals!
Mark Ost

Replies: 3
Views: 18325

PostForum: The Mineralogical Record   Posted: Dec 31, 2014 08:04   Subject: Re: 2014 Graphic Excellence Award again for the Mineralogical Record and two more medals!
More importantly, this was achieved in a time of struggling print media when many fine periodicals have gone extinct due to internet content or diminishing advertising budgets. This show that quality ...
  Topic: Merry Christmas 2014 and Happy New Year!
Mark Ost

Replies: 27
Views: 20634

PostForum: Off-Topic and Introductions   Posted: Dec 23, 2014 10:57   Subject: Re: Merry Christmas 2014 and Happy New Year!
That looks like an art deco tree. I like it.
  Topic: Why quartz parallel association is not a twin?
Mark Ost

Replies: 3
Views: 4914

PostForum: Minerals and Mineralogy   Posted: Dec 20, 2014 18:25   Subject: Re: Why quartz parallel association is not a twin?
I don't think the question was stupid. God knows all the rules are impossible to remember and as you know twin laws are not always obvious.
  Topic: Merry Christmas 2014 and Happy New Year!
Mark Ost

Replies: 27
Views: 20634

PostForum: Off-Topic and Introductions   Posted: Dec 19, 2014 17:28   Subject: Re: Merry Christmas 2014 and Happy New Year!
I hope all my friends around the world have a peaceful and Happy Christmas and holidays. Here is my mineral Christmas tree, from the US to you everywhere.
  Topic: When Do Crystals Stop Growing?
Mark Ost

Replies: 18
Views: 25731

PostForum: Minerals and Mineralogy   Posted: Dec 16, 2014 17:15   Subject: Re: When Do Crystals Stop Growing?
This is a really interesting topic and touches on scientific philosophy and systems of classification. There are many fields in science that experience the same problem. Linnean taxonomy works very we ...
 
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