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15 Jul-23:57:13 Re: sainte marie-aux-mines show 2018 (Roger Warin)
15 Jul-16:18:11 Re: sainte marie-aux-mines show 2018 (Roger Warin)
15 Jul-14:55:06 Sainte marie-aux-mines show 2018 / waiting for ste. Marie 2019! (Jordi Fabre)
15 Jul-09:03:39 Re: collection of michael shaw (Crosstimber)
14 Jul-17:32:24 The mizunaka collection - rhodochrosite (Am Mizunaka)
14 Jul-15:20:15 Re: green slime (Justin Hickok)
14 Jul-13:51:53 Re: green slime (Vic Rzonca)
14 Jul-12:02:23 Re: franjungle collection (Franjungle)
13 Jul-23:03:28 Re: green slime (Justin Hickok)
13 Jul-22:17:05 Re: green slime (Justin Hickok)
13 Jul-22:06:08 Re: green slime (Joseph D'oliveira)
13 Jul-21:52:07 Re: green slime (Justin Hickok)
13 Jul-21:27:39 Re: green slime (Matt_zukowski)
13 Jul-21:18:46 Re: apatite? (Amberh)
13 Jul-20:28:55 Re: green slime (Kushmeja)
13 Jul-19:50:29 Green slime (Justin Hickok)
13 Jul-18:08:11 Re: apatite? (Tom Tucker)
13 Jul-17:23:46 Re: collection of fiebre verde (Fiebre Verde)
13 Jul-09:07:59 Re: collection of fiebre verde (Pierre Joubert)
13 Jul-08:10:13 Re: collection of fiebre verde - coscuez (#694) (Fiebre Verde)
13 Jul-04:46:48 Re: collection of heimo hellwig (Heimo Hellwig)
12 Jul-22:17:18 Re: green petrified wood wa state? (Jeff)
12 Jul-19:19:51 Re: green petrified wood wa state? (Bob Morgan)
12 Jul-15:45:58 Re: green petrified wood wa state? (Jenrey1919)
12 Jul-15:21:32 Re: green petrified wood wa state? (Kushmeja)

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  Topic: Favourite Quartzes?
Josele

Replies: 38
Views: 16029

PostForum: Favorite Minerals   Posted: Jun 14, 2018 18:00   Subject: Re: Favourite Quartzes?
Bob, you are right, many characteristics are not clearly visible in a photo, that's why I like to say "I think that ..."

Is true that high end and fine gwindel specimens usually show both ...
  Topic: Favourite Quartzes?
Josele

Replies: 38
Views: 16029

PostForum: Favorite Minerals   Posted: Jun 14, 2018 15:47   Subject: Re: Favourite Quartzes?
... As to the question about whether the double crystal immediately above is a Gwindel, I don't think so. The attachment would be on a prism face.I think is not a gwindel precisely because the attachm ...
  Topic: I need help identifying these rocks, please. Thank you
Josele

Replies: 2
Views: 750

PostForum: What is it? - Where is it from?   Posted: Jun 07, 2018 08:22   Subject: Re: I need help identifying these rocks, please. Thank you
Please try to check some more properties of your sample as explained here: Asking: "What is this? / Where is it from?". Thanks.
  Topic: Can someone tell me what this is please.
Josele

Replies: 3
Views: 1005

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: May 31, 2018 09:23   Subject: Re: Can someone tell me what this is please.
Bubbles and color distribution in flow lines show up that it is a not-natural glass.
  Topic: Please identify
Josele

Replies: 5
Views: 1389

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: May 20, 2018 18:32   Subject: Re: Please identify
Really looks like glass slag.
Some slags can be so beautiful as to be collected although I think I can say that people in this forum we prefer natural crystals.
  Topic: Prospecting pegmatite for schorl: need help.
Josele

Replies: 8
Views: 3001

PostForum: Minerals and Mineralogy   Posted: Dec 13, 2017 16:01   Subject: Re: Prospecting pegmatite for schorl: need help.
I was wondering if Schorl is more likely to occur in the feldspatic part of the pegmatite outcrop, or rather in the part that has more quartz. ...
In the pegmatites of Cap de Creus area (eastern end ...
  Topic: Fluorescent inclusions in quartz
Josele

Replies: 4
Views: 1550

PostForum: What is it? - Where is it from?   Posted: Nov 24, 2017 04:20   Subject: Re: Fluorescent inclusions in quartz
Maybe hydrocarbons?
  Topic: Fluorescent inclusions in quartz
Josele

Replies: 4
Views: 1550

PostForum: What is it? - Where is it from?   Posted: Nov 23, 2017 06:54   Subject: Re: Fluorescent inclusions in quartz
Which kind of UV source did you use for checking fluorescence?
Long wave? Short wave?
  Topic: Questions about microcline
Josele

Replies: 6
Views: 2159

PostForum: Minerals and Mineralogy   Posted: Nov 20, 2017 17:35   Subject: Re: Questions about microcline
Carlsbad twin? What a surprise! One expect the typical "horns" in a carlsbad twin. After thinking a bit about it, I see that the twin operation is the same but in my specimen termination is ...
  Topic: Is this zircon ?
Josele

Replies: 9
Views: 2437

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Nov 19, 2017 15:28   Subject: Re: Is this zircon ?
Hello Dimce, welcome to FMF
Please read Asking: "What is this? / Where is it from?" and try to determine as many features as you can. With only these photos, our answers won't be very relia ...
  Topic: Questions about microcline
Josele

Replies: 6
Views: 2159

PostForum: Minerals and Mineralogy   Posted: Nov 19, 2017 14:24   Subject: Questions about microcline
First of all, thank you very much for your enlightening answers.
As a goniometer, I'm using a small carpenter's square (sorry Alfredo, I know this not very scientific!). As I'm looking for an angle v ...
  Topic: Questions about microcline
Josele

Replies: 6
Views: 2159

PostForum: Minerals and Mineralogy   Posted: Nov 18, 2017 14:19   Subject: Questions about microcline
I have understood that microcline and orthoclase can be distinguished at naked eye only when the crystal is very well developed and is not too small. Now I have a good microcline sample with flat shin ...
  Topic: Super thin hematite inclusions in amethyst
Josele

Replies: 22
Views: 5698

PostForum: Micros & Macros - Images of Minerals   Posted: Nov 12, 2017 13:37   Subject: Re: Super thin hematite inclusions in amethyst
.... Also from Minas.
Marco, with these colors, are you sure is not from Spain?
  Topic: Fluorite habit
Josele

Replies: 5
Views: 2112

PostForum: Minerals and Mineralogy   Posted: Nov 05, 2017 06:13   Subject: Re: Fluorite habit
Oh, now I see it, I had not thought about the possibility of man-made cleaved faces.
Thanks for your help.
  Topic: Fluorite habit
Josele

Replies: 5
Views: 2112

PostForum: Minerals and Mineralogy   Posted: Nov 04, 2017 18:05   Subject: Fluorite habit
No matter how hard I try, I'm not able to understand this crystal. The smaller at top looks like a cube modified by the dodecahedron. But these triangular faces at reflex, there is a step in the diago ...
  Topic: Rarest quartz twins with inclined axes C
Josele

Replies: 38
Views: 10116

PostForum: Minerals and Mineralogy   Posted: Nov 04, 2017 13:59   Subject: Re: Rarest quartz twins with inclined axes C
Reef, thank you for sharing your schemes of these little known twins. Is a hard work to recognize them in practice because the need of very accurate measurements. My level in crystallography do not al ...
  Topic: Help identifying rocks
Josele

Replies: 10
Views: 2465

PostForum: What is it? - Where is it from?   Posted: Oct 29, 2017 18:08   Subject: Re: Help identifying rocks
Could be:
1 - 5 = quartz / chalcedony
6 = maybe basalt
7 = sandstone / quarzite
8 = metamorphic rocks
9 = karstic calcite
10 - 11 = quartz / chalcedony
12 - 13 = metamorphic rocks
14 - 24 = qu ...
  Topic: Vesuvianite?
Josele

Replies: 1
Views: 1067

PostForum: What is it? - Where is it from?   Posted: Oct 29, 2017 11:45   Subject: Vesuvianite?
These days when we are seeing a lot of fabulous specimens displayed in the Munich Show, let me present an ugly piece. A few days ago I received a sample labeled as Unknown with blue calcite from Badak ...
  Topic: Rarest quartz twins with inclined axes C
Josele

Replies: 38
Views: 10116

PostForum: Minerals and Mineralogy   Posted: Oct 25, 2017 16:14   Subject: Re: Rarest quartz twins with inclined axes C
The prism of both crystals has a face parallel to the picture.
The crystal B is rotated 50 degrees in respect with A, that is the same angle between the prism and the rhombohedron, resulting that the ...
  Topic: Rarest quartz twins with inclined axes C
Josele

Replies: 38
Views: 10116

PostForum: Minerals and Mineralogy   Posted: Oct 25, 2017 15:56   Subject: Re: Rarest quartz twins with inclined axes C
Reef, sorry for my ignorance, I have not heard about these quartz twins before. They really fit the Twin definition by the International Union of Crystallography?
Which are the twin operations?
Than ...
 
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