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Newest topics and users posts
19 Oct-22:54:24 Green crystals in pegmatite? (Fuss)
19 Oct-20:40:42 Boulangerite (Recovering - Academic)
19 Oct-17:17:15 Peruvian pleasure (Recovering - Academic)
19 Oct-15:31:30 The mizunaka collection - topaz (Am Mizunaka)
19 Oct-12:14:16 Re: collection of fiebre verde - chivor (#688] (Fiebre Verde)
19 Oct-12:09:09 Re: collection of ras (Jordi Fabre)
19 Oct-11:16:34 Re: collection of ras (Robert Seitz)
19 Oct-10:16:10 Re: collection of fiebre verde - chivor (#688] (Philippe Durand)
19 Oct-10:10:55 Re: thin section rhyolithic tuff, srp (Bob Carnein)
19 Oct-07:39:11 Re: thin section rhyolithic tuff, srp (Peter Megaw)
19 Oct-06:58:58 Re: thin section rhyolithic tuff, srp (Peter Megaw)
19 Oct-06:11:47 Re: thin section rhyolithic tuff, srp (Flashfire90)
19 Oct-06:10:44 Re: thin section rhyolithic tuff, srp (Flashfire90)
19 Oct-06:09:38 Re: thin section rhyolithic tuff, srp (Flashfire90)
19 Oct-06:06:11 Thin section rhyolithic tuff, srp (Flashfire90)
19 Oct-01:33:53 Hematite (Recovering - Academic)
18 Oct-21:14:34 Under the microscope series (Recovering - Academic)
18 Oct-21:09:34 Torbernite crystals – large, beautiful and sexy!! (Recovering - Academic)
18 Oct-20:13:29 Re: collection of ras (Bob Harman)
18 Oct-19:48:25 Re: collection of ras (Robert Seitz)
18 Oct-17:59:03 Re: collection of fiebre verde (Bergur_e_sigurdarson)
18 Oct-17:52:53 Peruvian perfection – scrumdiddilyumptious (Recovering - Academic)
18 Oct-16:33:37 Re: collection of fiebre verde - quartz with unknown fibrous inclusions (#8820] (Fiebre Verde)
18 Oct-14:09:45 Re: new generation for picture - ploum (James)
18 Oct-13:49:13 Re: collection of michael shaw (James)

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  Topic: Large rocks on our property
Josele

Replies: 5
Views: 376

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Sep 21, 2018 18:32   Subject: Re: Large rocks on our property
It looks like quartz but I think is not a conglomerate (sedimentary origin) but a boulder of massive quartz related to igneous rocks.

Matt, you can check hardness trying to scratch a bottle glass. ...
  Topic: Unidentified vitreous stone
Josele

Replies: 12
Views: 666

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Sep 18, 2018 10:45   Subject: Re: Unidentified vitreous stone
After seeing this last photo, I would say it looks like an "aura quartz", that's a polished quartz pebble (natural) with a thin metallic exterior layer (artificial).
Polished stones can be ...
  Topic: Unidentified vitreous stone
Josele

Replies: 12
Views: 666

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Sep 18, 2018 07:08   Subject: Re: Unidentified vitreous stone
... Labradorite is dark green and mostly opaque. This stone is clear and colourless. Labradorescence only occurs in one plane and usually displays shades of yellow, green, and blue. This stone display ...
  Topic: Unidentified vitreous stone
Josele

Replies: 12
Views: 666

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Sep 17, 2018 20:03   Subject: Re: Unidentified vitreous stone
Could be Labradorite.
  Topic: Possible slag
Josele

Replies: 2
Views: 301

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Sep 16, 2018 17:28   Subject: Re: Possible slag.
It seems that there are many bubbles in the lower half seen on first photo that would reveal a glass slag.
  Topic: Who to trust with gemstone identification? Are some gemologists better than others?
Josele

Replies: 11
Views: 595

PostForum: Incorrect classification and fakes   Posted: Sep 07, 2018 10:10   Subject: Re: Who to trust with gemstone identification? Are some gemologists better than others?
..., I have a piece of Citrine that I wanted to make certain was genuine, and not baked Amethyst. ...
Adrian, some photos of the "citrine" in question will help to know what we are talking ...
  Topic: New find ID help
Josele

Replies: 10
Views: 807

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Sep 05, 2018 14:33   Subject: Re: New find ID help
Another vote for basalt, which usually contains enough magnetite to be attracted by a magnet.
  Topic: Unknown rock and mineral??
Josele

Replies: 5
Views: 691

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Aug 22, 2018 14:50   Subject: Re: Unknown rock and mineral??
Welcome to FMF!
Can't see very well the crystals lining the pocket but in the first photo some reflections look like rhombohedral faces of quartz to me.
You can check by trying to scratch a glass wi ...
  Topic: Could anyone identify this stone?
Josele

Replies: 12
Views: 747

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Aug 17, 2018 07:35   Subject: Re: Could anyone identify this stone?
Really looks like a piece of flint / chert (sedimentary siliceous rock).
Can check it trying to scratch a bottle glass with it. If glass stays permanent scratched will be as said.
Regards.
  Topic: Dog tooth calcite from where?
Josele

Replies: 8
Views: 505

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Aug 14, 2018 06:39   Subject: Re: dog tooth calcite
Size is in mm or cm?
Some testing and a closeup in higher resolution of the blue stuff will help.
  Topic: We celebrate the 12th anniversary of the beginning of FMF!
Josele

Replies: 19
Views: 1045

PostForum: Comments & Suggestions   Posted: Aug 13, 2018 08:48   Subject: Re: Today we celebrate the 12th anniversary of the beginning of FMF!
... My only suggestion if you can at some point change to vBulletin software
Peter, yes we can post videos in FMF, as is explained here: Now we can add videos
Regarding URL and e-mail addresses, th ...
  Topic: Favourite Quartzes?
Josele

Replies: 38
Views: 18850

PostForum: Favourite 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: 18850

PostForum: Favourite 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: 1076

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: 1261

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: 1644

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: 3800

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: 1841

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: 1841

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: 2571

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 ...
 
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