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Tsumeb Zincolivenite association - light blue acicular mineral = ?
3
cfrench58
5378
Aug 04, 2021 14:51Jordi Fabre
A new mineral: alpha-calcium formate
9
Cesar M. Salvan
13624
May 06, 2021 09:55Cesar M. Salvan
Calcite form
6
Josele
7980
Apr 26, 2021 11:17Josele
Synthetic smoky quartz?
11
Fraxinus
11451
Apr 12, 2021 11:08Amir Akhavan
Creedite - Is Pink Different than Purple, Navidad Mine (Mina Navidad)
9
Julie Wilson
11725
Mar 10, 2021 20:48alfredo
Betafo habit?
5
Sante Celiberti
7145
Feb 20, 2021 17:03Amir Akhavan
Comparison between 2 microscopes
0
Roger Warin
11715
Feb 16, 2021 15:41Roger Warin
Pyrite with bubble-like growths
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21
Pete Richards
24731
Jan 19, 2021 17:42Roger Warin
Proposed new system for classifying minerals
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15
Don Lum
17833
Jan 07, 2021 11:01Don Lum
Hunan China Calcite with Marcasite
5
John Hodgson
7625
Dec 17, 2020 20:35Bob Morgan
New mineral has been named kernowite, after the Cornish word for Cornwall
1
James Catmur
5483
Dec 12, 2020 14:28James Catmur
Minerals toxicity: Where can I find information?
12
Olivier
16125
Dec 12, 2020 10:18cascaillou
Why this fluorapatite is purple?
11
Luis Domínguez
23587
Dec 11, 2020 02:04Peter Lemkin
I'm seeking more information on Kara Oba, are any Japan Law twins from there??
0
Bob Morgan
9011
Dec 04, 2020 17:35Bob Morgan
Cylindrical calcite crystal?
5
Sante Celiberti
8309
Nov 26, 2020 23:39shravigunjal
Odd textures on this large beryl
10
RussEpp
12555
Nov 25, 2020 15:37RussEpp
Iceland Spar Discontinuity
8
Josele
10142
Nov 14, 2020 12:47Bob Morgan
Unusual bar pyrite from Nanisivik
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21
RussEpp
23256
Oct 31, 2020 09:49RussEpp
Very steep rhombohedral calcite?
14
Josele
79794
Oct 27, 2020 19:37RussEpp
Idiomorphic ruby crystal
0
Roger Warin
6762
Oct 23, 2020 16:22Roger Warin
Perovskites
4
Jayanth Kenway
5621
Oct 12, 2020 08:22James Catmur
Odd modifications on a cubic pyrite.
10
Sante Celiberti
11899
Aug 22, 2020 13:49Sante Celiberti
Habit restriction of garnets
13
Josele
24994
Jul 26, 2020 16:10Sante Celiberti
Complex calcite
7
Josele
14238
Jun 25, 2020 08:13Bob Morgan
Mercedes cross in fluorite
9
Roger Warin
13821
Jun 22, 2020 15:01Roger Warin
Pyrite scepters?
8
Sante Celiberti
14278
Apr 25, 2020 17:46Sante Celiberti
Aragonite "drill bit" twin
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16
Bob Carnein
26107
Apr 01, 2020 13:57Bob Morgan
Dark line in Brookite
2
tgleckler
11312
Mar 30, 2020 15:38tgleckler
Malachite twinning
5
RayStraw
16238
Mar 08, 2020 06:50RayStraw
Isotopic composition of German Silvers
6
Brent Lockhart
15733
Mar 03, 2020 23:08Brent Lockhart
The State of Modern Geology
14
marvinlewinsky
32788
Feb 21, 2020 01:27Matt_Zukowski
On Mineral collecting and Mineral Provenance
4
marvinlewinsky
14372
Feb 19, 2020 18:56cascaillou
Weird face in quartz
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32
Josele
59818
Feb 06, 2020 11:36Reef
The concept of matrix
8
Josele
17901
Jan 12, 2020 15:17Roger Warin
Clinozoisite... what it is and how was it formed?
2
RockHunter
11344
Dec 16, 2019 03:52RockHunter
Apatite related to the appetite of ungulates.
3
vic rzonca
12014
Dec 02, 2019 16:37alfredo
Color variation in azurite and malachite
10
RayStraw
19253
Nov 05, 2019 14:00RayStraw
Associations.
6
vic rzonca
12608
Oct 21, 2019 11:15Bob Carnein
Posters
7
RayStraw
14548
Aug 21, 2019 09:45Tobi
What defines a collection's quality
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23
cascaillou
42847
Aug 01, 2019 03:02Tobi
Certificates of authenticity for analyzed rare mineral specimens
7
Bob Harman
18088
Jul 29, 2019 20:29alfredo
Colours of Rhodochrosite and Other Mn Bearing Carbonates
9
al mar
15522
Jul 25, 2019 13:41Jordi Fabre
Stability of Azurite vs Malachite
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23
RayStraw
36901
Jun 13, 2019 11:46Peter Megaw
Quartz and Humboldtine? from Colombia
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16
John Rakovan
33643
Jun 02, 2019 13:36GregC12345
Stellerite from Mali
3
Gagat Minerals
10341
Mar 28, 2019 18:43Gagat Minerals
Pyrite modified with Diploid-high millers?
4
fena kuiperi
11377
Mar 15, 2019 12:25fena kuiperi
Beryl inclusion
6
tgleckler
11990
Feb 13, 2019 00:35Jordi Fabre
Carmeltazite
11
Pierre Joubert
18767
Jan 21, 2019 13:09Pete Modreski
Collecting focuses and how they can change
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24
Tobi
45543
Dec 05, 2018 04:11Tobi
Rarest quartz twins with inclined axes C
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42
Reef
73974
Nov 09, 2018 18:17Recovering - Academic
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