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Pyrite with bubble-like growths
19
Pete Richards
1310
Jan 09, 2021 09:21Bob Morgan
Proposed new system for classifying minerals
15
Don Lum
1401
Jan 07, 2021 11:01Don Lum
Luxullianite - UK
1
Roger Warin
342
Jan 03, 2021 10:04Pete Modreski
Hunan China Calcite with Marcasite
5
John Hodgson
1083
Dec 17, 2020 20:35Bob Morgan
New mineral has been named kernowite, after the Cornish word for Cornwall
1
James Catmur
560
Dec 12, 2020 14:28James Catmur
Minerals toxicity: Where can I find information?
12
Olivier
2025
Dec 12, 2020 10:18cascaillou
Why this fluorapatite is purple?
11
Luis Domínguez
9634
Dec 11, 2020 02:04Peter Lemkin
I'm seeking more information on Kara Oba, are any Japan Law twins from there??
0
Bob Morgan
509
Dec 04, 2020 17:35Bob Morgan
Cylindrical calcite crystal?
5
Sante Celiberti
1380
Nov 26, 2020 23:39shravigunjal
Odd textures on this large beryl
10
RussEpp
1529
Nov 25, 2020 15:37RussEpp
Iceland Spar Discontinuity
8
Josele
1561
Nov 14, 2020 12:47Bob Morgan
Unusual bar pyrite from Nanisivik
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21
RussEpp
2113
Oct 31, 2020 09:49RussEpp
Very steep rhombohedral calcite?
14
Josele
2358
Oct 27, 2020 19:37RussEpp
Idiomorphic ruby crystal
0
Roger Warin
605
Oct 23, 2020 16:22Roger Warin
Perovskites
4
Jayanth Kenway
989
Oct 12, 2020 08:22James Catmur
Odd modifications on a cubic pyrite.
10
Sante Celiberti
2170
Aug 22, 2020 13:49Sante Celiberti
Habit restriction of garnets
13
Josele
5358
Jul 26, 2020 16:10Sante Celiberti
Complex calcite
7
Josele
2373
Jun 25, 2020 08:13Bob Morgan
Mercedes cross in fluorite
9
Roger Warin
2723
Jun 22, 2020 15:01Roger Warin
Red fluorescence in Fluorite
6
Bob Carnein
2718
May 05, 2020 16:21Josele
Pyrite scepters?
8
Sante Celiberti
4786
Apr 25, 2020 17:46Sante Celiberti
Aragonite "drill bit" twin
16
Bob Carnein
10816
Apr 01, 2020 13:57Bob Morgan
Dark line in Brookite
2
tgleckler
6192
Mar 30, 2020 15:38tgleckler
Malachite twinning
5
RayStraw
10478
Mar 08, 2020 06:50RayStraw
Isotopic composition of German Silvers
6
Brent Lockhart
9386
Mar 03, 2020 23:08Brent Lockhart
The State of Modern Geology
14
marvinlewinsky
10847
Feb 21, 2020 01:27Matt_Zukowski
On Mineral collecting and Mineral Provenance
4
marvinlewinsky
9041
Feb 19, 2020 18:56cascaillou
Weird face in quartz
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32
Josele
32896
Feb 06, 2020 11:36Reef
The concept of matrix
8
Josele
9881
Jan 12, 2020 15:17Roger Warin
Clinozoisite... what it is and how was it formed?
2
RockHunter
7819
Dec 16, 2019 03:52RockHunter
Apatite related to the appetite of ungulates.
3
vic rzonca
7706
Dec 02, 2019 16:37alfredo
Color variation in azurite and malachite
10
RayStraw
8424
Nov 05, 2019 14:00RayStraw
Associations.
6
vic rzonca
7599
Oct 21, 2019 11:15Bob Carnein
Posters
7
RayStraw
8242
Aug 21, 2019 09:45Tobi
What defines a collection's quality
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23
cascaillou
24462
Aug 01, 2019 03:02Tobi
Certificates of authenticity for analyzed rare mineral specimens
7
Bob Harman
8405
Jul 29, 2019 20:29alfredo
Colours of Rhodochrosite and Other Mn Bearing Carbonates
9
al mar
7155
Jul 25, 2019 13:41Jordi Fabre
Stability of Azurite vs Malachite
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23
RayStraw
12857
Jun 13, 2019 11:46Peter Megaw
Quartz and Humboldtine? from Colombia
16
John Rakovan
11242
Jun 02, 2019 13:36GregC12345
Stellerite from Mali
3
Gagat Minerals
5580
Mar 28, 2019 18:43Gagat Minerals
Pyrite modified with Diploid-high millers?
4
fena kuiperi
4712
Mar 15, 2019 12:25fena kuiperi
Beryl inclusion
6
tgleckler
5274
Feb 13, 2019 00:35Jordi Fabre
Carmeltazite
11
Pierre Joubert
7203
Jan 21, 2019 13:09Pete Modreski
All the Diamonds one could fill your house with - and more - so near...yet so far.....
8
Peter Lemkin
6132
Jan 11, 2019 05:12Peter Lemkin
Collecting focuses and how they can change
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24
Tobi
22120
Dec 05, 2018 04:11Tobi
Rarest quartz twins with inclined axes C
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42
Reef
31529
Nov 09, 2018 18:17Recovering - Academic
Golden rutile analysis?
0
dontgogreen
18770
Nov 02, 2018 13:43dontgogreen
"Frosted patterns" on the faces of Quartz
10
Reef
9509
Oct 01, 2018 16:33Bob Morgan
Termination in a tourmaline crystal
2
marco campos-venuti
3693
Aug 28, 2018 13:13John S. White
Question about Fluorite on Quartz
6
Richard Arseneau
4845
Aug 19, 2018 23:04Robert Seitz
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