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21 Feb-19:43:14 Re: help identify this please (Joshua B.)
21 Feb-19:04:39 Re: gail spann's tucson adventures. February 2018. (Gail)
21 Feb-18:59:39 Re: gail spann's tucson adventures. February 2018. (Gail)
21 Feb-18:52:46 Re: gail spann's tucson adventures. February 2018. (Gail)
21 Feb-18:43:45 Re: gail spann's tucson adventures. February 2018. (Gail)
21 Feb-18:30:29 Re: gail spann's tucson adventures. February 2018. (Gail)
21 Feb-18:24:55 Re: gail spann's tucson adventures. February 2018. (Gail)
21 Feb-18:13:14 Re: gail spann's tucson adventures. February 2018. (Gail)
21 Feb-16:42:50 Re: help with this one as well.. (Alfredo)
21 Feb-13:53:37 Re: collection of kakov - eudyalite (Kakov)
21 Feb-13:35:39 Re: help identify this please (Pete Richards)
21 Feb-13:29:06 Re: help with this one as well.. (Bob Harman)
21 Feb-13:14:04 Re: a new find: hoganite from morocco (Manuel Mesa)
21 Feb-13:06:35 Re: favourite fluorites? (Jesse Fisher)
21 Feb-13:02:36 Re: a new find: hoganite from morocco (Alfredo)
21 Feb-13:00:29 Re: ? peacock ore? (Bob Carnein)
21 Feb-12:43:51 Re: a new find: hoganite from morocco (Pete Modreski)
21 Feb-12:41:44 Re: help identify this please (Joshua B.)
21 Feb-12:37:09 Re: help identify this please (Dale Hallmark)
21 Feb-12:35:18 Re: help with this one as well.. (Dale Hallmark)
21 Feb-12:29:59 Re: help with this one as well.. (Joshua B.)
21 Feb-12:24:45 Re: help identify this please (Jordi Fabre)
21 Feb-12:21:54 Re: help with this one as well.. (Jordi Fabre)
21 Feb-12:03:22 Re: a new find: hoganite from morocco (Manuel Mesa)
21 Feb-11:57:33 A new find: hoganite from morocco (Manuel Mesa)

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  Topic: A new find: Hoganite from Morocco
Pete Modreski

Replies: 4
Views: 240

PostForum: Minerals and Mineralogy   Posted: Feb 21, 2018 12:43   Subject: Re: A new find: Hoganite from Morocco
I had to look up hoganite to see what it was. So, it's copper acetate monohydrate. Given the unusual nature of the mineral and the abundance of it shown in these specimens (vs. the scarcity of it at ...
  Topic: Concrete as a mineral
Pete Modreski

Replies: 6
Views: 604

PostForum: Off-Topic and Introductions   Posted: Jan 29, 2018 17:57   Subject: Re: Concrete as a mineral
Yes, Tom, as has been said, it's a very complicated subject.
One can, indeed, discuss concrete as "a rock", but the part of your question, "what mineral would it be", isn't exactl ...
  Topic: Help Identifying Unusual Fireplace Rocks
Pete Modreski

Replies: 11
Views: 992

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jan 24, 2018 16:05   Subject: Re: Help Identifying Unusual Fireplace Rocks
Well, Opositica, I think no one has responded because it's pretty hard to impossible to really tell what that one is--to make any guess that's likely to be correct. It "could" be a type of ...
  Topic: A Bit On The Economics Of Being A mineral Dealer
Pete Modreski

Replies: 11
Views: 1329

PostForum: Off-Topic and Introductions   Posted: Jan 19, 2018 12:13   Subject: Re: A Bit On The Economics Of Being A mineral Dealer
Bob, for what it's worth, from what you described about the Midwestern dealers that you surveyed, I would tend to think that these would more likely be classed as "low-end" rather than " ...
  Topic: Locality for this probable natrolite (?) specimen?
Pete Modreski

Replies: 5
Views: 631

PostForum: What is it? - Where is it from?   Posted: Jan 19, 2018 00:06   Subject: Re: Locality for this probable natrolite (?) specimen?
Thanks for the reply and for posting your picture! (And thanks for your replies too, John & Pete). Wow, your specimen looks exactly like the one we have (though a bit cleaner). So it seems likel ...
  Topic: Locality for this probable natrolite (?) specimen?
Pete Modreski

Replies: 5
Views: 631

PostForum: What is it? - Where is it from?   Posted: Jan 18, 2018 19:09   Subject: Locality for this probable natrolite (?) specimen?
Forum folks, for a change I have a specimen to ask if anyone recognizes the identity or locality of (it was among material donated for the gift shop at Dinosaur Ridge--no labeling came with it); shown ...
  Topic: Help Identifying Unusual Fireplace Rocks
Pete Modreski

Replies: 11
Views: 992

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jan 17, 2018 16:52   Subject: Re: Help Identifying Unusual Fireplace Rocks
They are rocks with a lot of mica in them--that's what you are seeing.

In general, a mica-rich rock like these is schist, a type of metamorphic rock.

The pink rock, however, probably contains le ...
  Topic: Help Identifying Unusual Fireplace Rocks
Pete Modreski

Replies: 11
Views: 992

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jan 17, 2018 10:47   Subject: Re: Help Identifying Unusual Fireplace Rocks
Good one!
  Topic: Help Identifying Unusual Fireplace Rocks
Pete Modreski

Replies: 11
Views: 992

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jan 17, 2018 10:09   Subject: Re: Help Identifying Unusual Fireplace Rocks
And it looks to be amethyst (purple quartz). It is purple, as it appears in the photo, yes?
  Topic: Thoughts on this one?
Pete Modreski

Replies: 4
Views: 560

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jan 16, 2018 15:13   Subject: Re: Thoughts on this one?
Greg, since doing a scratch test for hardness is the means of testing that you most readily have at your disposal, and if you can do a few more scratch tests on an inconspicuous part of the mineral fo ...
  Topic: Minerals sans life
Pete Modreski

Replies: 15
Views: 1969

PostForum: Minerals and Mineralogy   Posted: Dec 06, 2017 13:22   Subject: Re: Minerals sans life
Tom, this interesting question has actually been the subject of a whole series of papers, by Robert M. Hazen of the Geophysical Laboratory of the Carnegie Institution of Washington and then with follo ...
  Topic: What is it #2
Pete Modreski

Replies: 6
Views: 1126

PostForum: What is it? - Where is it from?   Posted: Nov 24, 2017 12:47   Subject: Re: What is it #2
Andrew, I think that what looks like crystal faces on your piece of coal, is just the way the coal breaks. It tends to fracture along flat, perpendicular planes; it's a type of cleavage, and in coal m ...
  Topic: What is it #3
Pete Modreski

Replies: 3
Views: 816

PostForum: What is it? - Where is it from?   Posted: Nov 22, 2017 17:28   Subject: Re: What is it #3
I agree with Pete; I think this one is a piece of slag--iron-rich glassy material left from some kind of a smelter. It appears to have air bubbles in it, and the swirly texture on the top surface are ...
  Topic: What is it #2
Pete Modreski

Replies: 6
Views: 1126

PostForum: What is it? - Where is it from?   Posted: Nov 22, 2017 16:28   Subject: Re: What is it #2
I am thinking you have a piece of coal. Does it feel THAT light?
  Topic: What is this
Pete Modreski

Replies: 3
Views: 683

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Nov 22, 2017 13:20   Subject: Re: What is this
No, no limits here, though we always appreciate it if someone does not post 10 or 20 unknowns one after the other!
  Topic: What is this
Pete Modreski

Replies: 3
Views: 683

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Nov 22, 2017 12:34   Subject: Re: What is this
I got a smile out of seeing your reference to the "killas" host rocks, which is a term I haven't much seen or thought about, since I once visited mines in Cornwall, several decades ago! A c ...
  Topic: Is this zircon ?
Pete Modreski

Replies: 9
Views: 1374

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Nov 20, 2017 15:47   Subject: Re: Is this zircon ?
I agree, that this looks more like garnet than anything else.

Here is a suggestion, if you know someone who has access to both a short and a long wave ultraviolet light. Examine it for fluorescenc ...
  Topic: Mineral names in different languages and their meaning
Pete Modreski

Replies: 16
Views: 2258

PostForum: Minerals and Mineralogy   Posted: Nov 18, 2017 15:45   Subject: Re: Mineral names in different languages and their meaning
Tobi, I am sure you may get many replies to this. There are MANY such names in English--some old, some more recently coined, many originating in the U.K., but some in America too. I know of a few su ...
  Topic: Help identifying my stone. UK coastline.
Pete Modreski

Replies: 2
Views: 731

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Nov 03, 2017 11:59   Subject: Re: Help identifying my stone. UK coastline.
Dear Iceantia,
I'm sure you will understand, as per Jordi's reply, that first there are just not any very distinctive features about this pebble that would help us to even make a good guess as to it ...
  Topic: I got a idea but not sure
Pete Modreski

Replies: 4
Views: 843

PostForum: What is it? - Where is it from?   Posted: Nov 01, 2017 11:41   Subject: Re: i got a idea but not sure
Depending on the accuracy of your specific gravity measurement, the sp. gr. suggests beryl (though the crystal shape does not suggest beryl), or quartz (if your measurement has enough error to encompa ...
 
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