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Newest topics and users posts
19 Jun-16:17:25 Amethyst and...? (Linus)
19 Jun-09:17:29 Re: collection of annemieke en rob schnerr (Rob Schnerr)
19 Jun-08:52:18 Re: fake ruby? (Bob Carnein)
19 Jun-00:44:02 Re: a potpourri of musings....barely related to minerals. (Peter Lemkin)
19 Jun-00:01:57 Re: fake ruby? (Fuss)
18 Jun-22:24:43 Re: a potpourri of musings....barely related to minerals. (Bob Harman)
18 Jun-13:28:28 Re: cleaning nifontovite (Linus)
18 Jun-10:58:47 Re: collection of annemieke en rob schnerr (Rob Schnerr)
18 Jun-10:52:09 Re: cinnabar and not realgar inclusions? (Rob Schnerr)
18 Jun-08:03:25 Re: malachite (Raystraw)
18 Jun-06:40:06 Re: cleaning nifontovite (Bob Harman)
18 Jun-06:38:09 Re: cleaning nifontovite (Peter Megaw)
18 Jun-04:49:48 Re: cleaning nifontovite (R Saunders)
18 Jun-01:11:10 Re: collection of annemieke en rob schnerr (Tobi)
18 Jun-01:03:33 Re: malachite (Tobi)
17 Jun-22:03:54 Re: cleaning nifontovite (Peter Megaw)
17 Jun-19:20:20 Re: malachite (Bob Harman)
17 Jun-17:54:29 Malachite (Raystraw)
17 Jun-14:53:24 Re: cleaning nifontovite (Bob Harman)
17 Jun-14:53:18 Re: cleaning nifontovite (Kushmeja)
17 Jun-14:40:38 The mizunaka collection - quartz (Am Mizunaka)
17 Jun-14:37:55 Cleaning nifontovite (Linus)
17 Jun-09:44:35 Re: collection of michael shaw (Crosstimber)
17 Jun-08:53:56 Re: collection of annemieke en rob schnerr (Rob Schnerr)
17 Jun-07:36:08 Re: cinnabar and not realgar inclusions? (Niels Brouwer)

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  Topic: Please help identify : BLACK glass like stone with tiny pink „crystals”???
Josele

Replies: 6
Views: 452

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: 15
Views: 3899

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:
  Topic: Help identifying beautiful mineral
Josele

Replies: 3
Views: 675

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Mar 31, 2019 16:42   Subject: Re: Help identifying beautiful mineral
... could it be silicon carbide with such low density?For what can see at photos, seem to be plenty of bubbles inside which could explain the low density in addition to confirm that it is a slag.
  Topic: Help identifying beautiful mineral
Josele

Replies: 3
Views: 675

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Mar 31, 2019 08:30   Subject: Re: Help identifying beautiful mineral
If it really is so hard could be silicon carbide.
  Topic: Faden article
Josele

Replies: 3
Views: 660

PostForum: Mineralogical Literature   Posted: Feb 20, 2019 07:21   Subject: Re: Faden article
In MINERAL UP magazine, Vol VI, nº 4, December 2016 (published in Spain in English language), there is an extensive article about faden quartz authored by Jesus Fraile and Miguel Calvo with photos by ...
  Topic: What stone is around this fireplace?
Josele

Replies: 1
Views: 479

PostForum: What is it? - Where is it from?   Posted: Feb 03, 2019 14:02   Subject: Re: What stone is around this fireplace?
The darkest one looks like a brecciated black marble and the brown one could be also a carbonate rock, maybe with any degree of metamorphism too.
Is more reliable to do the acid test with a drop of d ...
  Topic: Black mineral ID help needed
Josele

Replies: 13
Views: 1673

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Nov 24, 2018 13:38   Subject: Re: Black mineral ID help needed
I bet these small grains will stick a neodymium magnet but this will occur both with schorl and hornblende, not a useful test to distinguish between these minerals but will discard manganese oxides.
  Topic: Black mineral ID help needed
Josele

Replies: 13
Views: 1673

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Nov 23, 2018 18:58   Subject: Re: Black mineral ID help needed
Kara, did you find it in a pegmatite area? Could be micro-crystallized schorl.
Maybe you can check the hardness trying to scratch a bottle glass pressing hard and dragging an acute corner of the samp ...
  Topic: Black tourmaline in a fan shape
Josele

Replies: 13
Views: 1873

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Nov 10, 2018 13:03   Subject: Re: Black tourmaline in a fan shape
Here is the link:
Schorl from North Korea
  Topic: Collection of Fiebre Verde
Josele

Replies: 686
Views: 416368

PostForum: Collection photos and Collector's page   Posted: Nov 03, 2018 20:59   Subject: Re: Collection of Fiebre Verde
Lovely apatite Gérard, and from a unusual locality, thanks for sharing. It's a pleasure this pink touch in your green jungle.
Color and transparency reminds me some Baltistan apatites that are very f ...
  Topic: Noob....need a little guidance here...
Josele

Replies: 16
Views: 1987

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Oct 31, 2018 20:43   Subject: Re: Noob....need a little guidance here...
I have to disagree with Josele, not all agates are geodes.
...
I do concur with Tobi in the sense that "geode" is a morphological term.Touché!
...Or maybe your flat agate is the excepti ...
  Topic: Noob....need a little guidance here...
Josele

Replies: 16
Views: 1987

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Oct 31, 2018 11:14   Subject: Re: Noob....need a little guidance here...
Coming back to the original question, I think that a proper name for these samples could be underdevelloped agate
To me, all agates are geodes (or were in a primary state, later collapsed) but not al ...
  Topic: inclusion in aquamarine?
Josele

Replies: 4
Views: 832

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Oct 21, 2018 03:39   Subject: Re: inclusion in aquamarine?
Looks like schorl to me. Where is it from?
  Topic: Green crystals in Pegmatite?
Josele

Replies: 13
Views: 1853

PostForum: FOR BEGINNERS: What is it? Where is it from?   Posted: Oct 20, 2018 06:28   Subject: Re: green crystals in Pegmatite?
Hard to say without seeing any crystal face but in a pegmatite and with this color I think it could be tourmaline. Try to check the hardness...
  Topic: Large rocks on our property
Josele

Replies: 5
Views: 1289

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: 2043

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: 2043

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: 2043

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: 996

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: 1848

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 ...
 
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