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Tanzanite pleochroism
3
Roger Warin
343
Dec 06, 2024 15:27cascaillou
Lego Rhodochrosite, Amethyst Geode, Black Tourmaline with Aquamarine, Orange Quartz, Emera
10
James Catmur
1560
Dec 06, 2024 14:16cascaillou
Pezzottaite, new specimens
1
Roger Warin
1357
Oct 19, 2024 17:44Pete Richards
Public mining in Oaxaca, Mexico
15
ancientmttreasures
23880
Oct 16, 2024 16:54AndreyWhiteB
Fluorite crystallography?
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28
Tobi
100192
Oct 01, 2024 05:15Johan Kjellman
Colors of minerals
7
James Catmur
1729
Sep 18, 2024 10:24James Catmur
Gold nugget formation from earthquake-induced piezoelectricity in quartz
0
Matt_Zukowski
1148
Sep 03, 2024 22:12Matt_Zukowski
Moschellandsbergite / Wow !
3
Roger Warin
1456
Aug 17, 2024 15:00Roger Warin
Quartz crystal shape
2
marco campos-venuti
1283
Aug 09, 2024 11:09Bob Morgan
Vorobyevite, a 7th variety of beryl
2
Roger Warin
1430
Jul 24, 2024 05:56Riccardo Modanesi
Inclusion of Pezzotaite in Quartz
3
Roger Warin
1722
Jul 08, 2024 15:15Roger Warin
Is Malachite Rare?
3
Matt_Zukowski
1764
Jun 20, 2024 16:24Linus
Is it possible for this specimen of Hyalite to be associated with other minerals?
8
Rick Roan
2005
Jun 01, 2024 20:02alfredo
Mineral identification tips
9
Robson Vieira
2357
Jun 01, 2024 07:40cascaillou
Provide Miller indices in practice please
11
Robson Vieira
2782
May 30, 2024 09:49Robson Vieira
Mystery stone, who knows what it is?
1
Flubbelyte
2111
Apr 17, 2024 16:31Jordi Fabre
Trying to find information on rose/pink quartz and tourmaline associations.
17
Ning
6991
Mar 30, 2024 09:14Amir Akhavan
Mineralogy & Museums 10 - Cardiff - 12th-13th August 2024
0
Roy Starkey
3854
Mar 18, 2024 06:47Roy Starkey
Can you recommend a lab to analyse specimens
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29
James Catmur
16819
Mar 12, 2024 07:36Luiz Oliveira
How do calcium carbonate Vaterite and Calcite crystals form?
0
James Catmur
3057
Mar 02, 2024 13:25James Catmur
60th Anniversary of the death of Sir Arthur Russell - Free talk and workshop
0
Roy Starkey
11268
Feb 17, 2024 14:58Roy Starkey
New York State: A Topographic Mineralogy (NEW BOOK) Posted on behalf of Steve Chamberlain
0
Roy Starkey
15072
Dec 11, 2023 16:46Roy Starkey
Nifontovite
8
Roger Warin
6734
Dec 10, 2023 18:26Peter Megaw
Metamict
1
Luiz Oliveira
4001
Dec 03, 2023 07:17Luiz Oliveira
Fluorite Star
3
Roger Warin
6363
Nov 28, 2023 20:06Pete Richards
Le Burc?
8
Chriss
15443
Nov 13, 2023 13:47James Catmur
Pele's Hair and Tears
5
Roger Warin
9402
Sep 27, 2023 06:18James Catmur
New species accepted by the IMA?
10
Roger Warin
13437
Aug 08, 2023 21:55Roger Warin
Minerals of the distant future
4
Tom Mazanec
8672
Aug 05, 2023 09:07Bob Carnein
Garnets in granite pegmatites by Olav Revheim
1
Tobi
6402
Aug 02, 2023 08:35Roger Warin
Quartz: parallel growth or not?
3
Roger Warin
7590
Jul 23, 2023 22:37Roger Warin
"Stain(?)" on Milpillas Azurite specimen
2
bob kerr
7533
Jul 05, 2023 14:37RayStraw
New article discussing the morphological features and oddities in Colombian emerald
1
Fiebre Verde
8724
May 25, 2023 06:55Roger Warin
An idea for a collection
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20
Richard Arseneau
20268
May 19, 2023 11:38marco campos-venuti
Azurite to Malachite Chemistry
9
RayStraw
10480
May 05, 2023 21:35Bob Morgan
Tarnish on cubanite
9
Pete Richards
10871
Apr 24, 2023 14:20Roger Warin
What should we do with our collections? Special event on Zoom - Wednesday 19 April 20:00 B
12
Roy Starkey
12365
Apr 23, 2023 17:02James Catmur
Calcite geode from Idar
2
Roger Warin
4167
Apr 21, 2023 18:27Linus
Problem with identification
6
mineralowitz
7064
Mar 29, 2023 10:17Bob Carnein
A very strange specimen of Hardin Co., Illinois
6
k-m.minerals
8020
Mar 17, 2023 00:52k-m.minerals
Azurite to Malachite pseudomorphs
0
RayStraw
13045
Feb 26, 2023 17:50RayStraw
Mineral Labeling: how to properly acknowledge specimen is from an earlier collection
7
Frank Perry
6616
Feb 24, 2023 04:07James Catmur
Diamond pseudomorphs after graphite
8
James Catmur
6835
Feb 22, 2023 05:12James Catmur
Galena Spinel law
8
John Hodgson
7902
Feb 13, 2023 03:55Tobi
Can alpha radiation from titanite, zircon, etc. affect other mineral specimens?
4
Garret
5045
Feb 10, 2023 19:05Amir Akhavan
Elbaite from Pala ?
1
Roger Warin
4052
Feb 05, 2023 23:43Jesse Fisher
Unique Schorl Double Terminations
19
bob kerr
12586
Jan 26, 2023 15:42Roger Warin
About the tourmaline twin
6
Roger Warin
8652
Jan 07, 2023 10:50Pete Richards
Oxidation of Copper, Lead, and Zinc sulfides and transport below the surface
4
RayStraw
7130
Jan 04, 2023 15:22Pete Modreski
Shielding effect of pyrite solid inclusions in a Colombian emerald crystal
1
Fiebre Verde
4845
Dec 26, 2022 05:55James Catmur
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