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18 Feb-04:42:43 Re: collection of annemieke en rob schnerr (Rob Schnerr)
18 Feb-04:12:13 Re: andalusie rockhunting trip (Jitkakar)
18 Feb-00:48:18 The mizunaka collection - quartz (Am Mizunaka)
17 Feb-21:11:47 Re: unidentified green crystal (Bob Carnein)
17 Feb-20:25:52 Re: the joy of tucson, 2020 gail spann experience (Marvinlewinsky)
17 Feb-18:56:36 Re: tucson show 2020 (Gail)
17 Feb-18:50:53 Re: the joy of tucson, 2020 gail spann experience (Gail)
17 Feb-18:47:17 Re: the joy of tucson, 2020 gail spann experience (Gail)
17 Feb-18:32:18 Re: the joy of tucson, 2020 gail spann experience (Gail)
17 Feb-16:58:13 Re: unidentified green crystal (Mkomishyn)
17 Feb-16:21:35 Re: unidentified green crystal (Pete Richards)
17 Feb-16:17:55 Re: unidentified green crystal (Mkomishyn)
17 Feb-16:09:03 Re: on mineral collecting and mineral provenance (Marvinlewinsky)
17 Feb-16:07:15 Re: unidentified green crystal (Alfredo)
17 Feb-15:52:59 Re: unidentified green crystal (Pete Richards)
17 Feb-15:45:51 Re: unidentified green crystal (Mkomishyn)
17 Feb-15:41:33 Re: unidentified green crystal (Mkomishyn)
17 Feb-15:39:10 Re: unidentified green crystal (Pete Richards)
17 Feb-15:14:06 Re: unidentified green crystal (Mkomishyn)
17 Feb-15:08:37 Re: on mineral collecting and mineral provenance (Jesse Fisher)
17 Feb-14:46:40 On mineral collecting and mineral provenance (Marvinlewinsky)
17 Feb-14:42:52 Re: unidentified green crystal (Anísio Cláudio)
17 Feb-14:24:56 Re: unidentified green crystal (John Betts)
17 Feb-14:19:44 Re: unidentified green crystal (Mkomishyn)
17 Feb-14:17:11 Re: unidentified green crystal (Mkomishyn)

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  Topic: Variscite? Turquoise?
Josele

Replies: 15
Views: 695

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Feb 04, 2020 14:19   Subject: Re: Tortoise Variscite? Spiderweb Turqoise?
... I’m not sure if I understand fully - are you saying you think these are not all the same material? ...Hello, Joe, no, I meant the black one, your samples are rocks (mix of minerals), metamorphic r ...
  Topic: Variscite? Turquoise?
Josele

Replies: 15
Views: 695

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Feb 04, 2020 13:45   Subject: Re: Tortoise Variscite? Spiderweb Turqoise?
Hello X (sorry I don't know your name), welcome to FMF.

When asking for identification should provide the maximum of additional data, as is stated in the introduction thread of this section: Asking ...
  Topic: Help to identify this rock, please
Josele

Replies: 4
Views: 267

PostForum: What is it? - Where is it from?   Posted: Feb 02, 2020 16:13   Subject: Re: Help to identify this rock, please
Could be a mafic igneous rock, gabbro type for example.

As said, without proper analysis is not possible to classify a rock with precision.

Bob gives a good clue with the geological map when it ...
  Topic: A giant Vanadinite
Josele

Replies: 4
Views: 922

PostForum: Micros & Macros - Images of Minerals   Posted: Jan 20, 2020 18:38   Subject: Re: A giant Vanadinite
Wow!
Hexagons are more than one inch big! It must feel very heavy in hand!
A world class piece, best I've ever seen.
Thanks for sharing it.
  Topic: New to the site ! Beginner trying to identify.
Josele

Replies: 2
Views: 380

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jan 18, 2020 12:50   Subject: Re: New to the site ! Beginner trying to identify.
Hello Elana, welcome to FMF.
Identification requests should be accompanied with some additional data. Please read Asking: "What is this? / Where is it from?" and give us the maximum of info ...
  Topic: Charcas - Pink Mineral
Josele

Replies: 10
Views: 829

PostForum: What is it? - Where is it from?   Posted: Jan 18, 2020 06:16   Subject: Re: Charcas - Pink Mineral
How misleading can be a mineral photo, last one could be confused with globular chalcedony from Mamuju, Indonesia!
  Topic: Some carvings
Josele

Replies: 11
Views: 705

PostForum: Off-Topic and Introductions   Posted: Jan 14, 2020 12:38   Subject: Re: Some carvings
Agree with Tobi, is not rose quartz, looks like quartzite or maybe massive quartz stained by oxides.
Also in accord that most FMF members we prefer natural crystals.
But I think this kind of handcra ...
  Topic: Rock Identification
Josele

Replies: 8
Views: 489

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jan 12, 2020 12:33   Subject: Re: Rock Identification
Hello Mark, maybe you have no responses because often is not possible identifying rocks just seeing photos.
I don't know what these beautiful rocks are but to me they don't look like basalt.
You can ...
  Topic: I really need some help with identifying
Josele

Replies: 3
Views: 281

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Jan 11, 2020 15:15   Subject: Re: I really need some help with identifying
In index page (home page) look for "FOR BEGINNERS: What is it? Where is it from?" or "What is it? - Where is it from?". Click the appropriate option and a new page will be open. Up ...
  Topic: The concept of matrix
Josele

Replies: 8
Views: 997

PostForum: Minerals and Mineralogy   Posted: Jan 07, 2020 19:14   Subject: Re: The concept of matrix
Let me clarify that I used the concept "mother rock" as literal translation of roca madre which is Spanish is synonym of "host rock" (roca encajante) and also synonym of "matr ...
  Topic: The concept of matrix
Josele

Replies: 8
Views: 997

PostForum: Minerals and Mineralogy   Posted: Jan 07, 2020 05:14   Subject: The concept of matrix
Often the word matrix is used in mineral forums as the substrate of the main specie or most prominent crystals of a specimen, even when this substrate is another mineral specie and not the rock where ...
  Topic: What type of metamorphic rock is this?
Josele

Replies: 16
Views: 1027

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Dec 12, 2019 08:14   Subject: Re: What type of metamorphic rock is this?
Is strange that in a museum there is not a label identifying the sample.

It looks like gneiss with a quite high proportion of mafic minerals, which would be a HIGH grade metamorphic rock.
  Topic: What is this?
Josele

Replies: 3
Views: 599

PostForum: What is it? - Where is it from?   Posted: Dec 11, 2019 18:25   Subject: Re: What is this?
Some additional data will help identification. Please see: Asking: "What is this? / Where is it from?"

Maybe there is more than one species here. Closeup photos will help too.
  Topic: Unstable pyrite
Josele

Replies: 15
Views: 1512

PostForum: Conserving, Preparing and Cleaning Minerals   Posted: Nov 12, 2019 17:55   Subject: Re: Unstable pyrite
My experience is that, when kept under the same conditions, pyrite from some localities tends to decompose after a time, while pyrite from other localities stays stable. In my very first rock drawers ...
  Topic: What rock is this?
Josele

Replies: 9
Views: 1421

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Sep 20, 2019 04:08   Subject: Re: What rock is this?
My humble opinion is based on the fact that I don't know of volcanic deposits near Como. But maybe they exist...
  Topic: What rock is this?
Josele

Replies: 9
Views: 1421

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Sep 19, 2019 10:15   Subject: Re: What rock is this?
To me, it looks like slag glass.
  Topic: First Post, Black Specimen
Josele

Replies: 8
Views: 1249

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Sep 04, 2019 17:23   Subject: Re: First Post, Black Specimen
The black one seems a kind of chert / flint that can be used as touchstone to check precious metals.
  Topic: Purchased online, what is this blueish green stone?
Josele

Replies: 8
Views: 1806

PostForum: What is it? - Where is it from?   Posted: Jul 16, 2019 12:52   Subject: Re: Purchased online, what is this blueish green stone?
My crystal ball says:
If it is from Bahía (Brasil) it could be fluorapatite.
If it is from Madagascar then it could be grandidierite.
  Topic: Please help identify : BLACK glass like stone with tiny pink „crystals”???
Josele

Replies: 6
Views: 1387

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: May 26, 2019 16:48   Subject: Re: Please help identify : BLACK glass like stone with tiny pink „crystals”???
Hello Olivia, welcome to FMF.
Enlarged photos show what seem to be small bubbles. If so, I think it could be a slag glass.
A nice find anyway.
  Topic: Favourite Barytes?
Josele

Replies: 20
Views: 7378

PostForum: Favourite Minerals   Posted: May 13, 2019 08:05   Subject: Re: Favourite Barytes?
Here comes a honey colored Chinese baryte with weird deformed faces and unusual fluorescence:
 
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