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Could this be a very rare limestone shatter cone from the UK?
18
James Hunt
25065
May 19, 2016 00:52James Catmur
Moor's head elbaite
0
Roger Warin
6400
May 11, 2016 10:48Roger Warin
Pericline
13
Josele
21492
May 10, 2016 16:25Roger Warin
Abellaite, new mineral species, the first new mineral species discovered in Catalonia
0
joan abella creus
7710
Mar 30, 2016 04:39joan abella creus
Iridescent cuprite from Milpillas
5
bob kerr
8933
Mar 17, 2016 16:29lluis
Best examples of trapiche emerald crystals?
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21
Jim
36457
Mar 14, 2016 13:33Elise
Trapiche Pezzottaite
4
Elise
12365
Mar 14, 2016 13:23Elise
What causes the blue color of the stones of the beaches of Flores, Indonesia?
9
Elise
14688
Mar 14, 2016 12:54lluis
Beryl with steep endings
7
Roger Warin
12988
Mar 09, 2016 18:21Edelmin
I need everyone's opinion on this specimen I found.
10
levi.nivison
15339
Feb 22, 2016 16:20Pete Modreski
Gold from Bastogne (Belgium)
0
Roger Warin
6746
Feb 21, 2016 16:58Roger Warin
Cuprian Gold
1
Roger Warin
5062
Feb 20, 2016 15:12alfredo
Mexican Calcite
2
Roger Warin
5731
Feb 19, 2016 07:52Roger Warin
Optical Mineralogy and Crystallography
5
Elise
12143
Jan 11, 2016 11:20Elise
Corundum localities
0
Elise
6838
Dec 31, 2015 14:19Elise
Lessons from crystal morphology of zunyite with a nod to sphalerite
1
Pete Richards
8453
Nov 26, 2015 09:14Elise
Strange planes in quartz
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25
Josele
40601
Nov 04, 2015 04:22Xueyan Jin
Strange kind of crystal growth of galena and sphalerite
5
Tobi
10823
Nov 03, 2015 22:26Xueyan Jin
On the ease of gypsum crystal growth.
2
vic rzonca
6097
Oct 28, 2015 10:01vic rzonca
Morphology of Amethyst from Windham County, Connecticut
2
kushmeja
8037
Sep 27, 2015 19:14Pete Richards
Natural Cleaved Corners In Fluorite: Damage Or Not?
2
Casimir Sarisky
7122
Aug 24, 2015 15:07Casimir Sarisky
Allanite-(La)?
6
lluis
19973
Aug 14, 2015 02:56Jordi Fabre
When Do Crystals Stop Growing?
18
Screenname
33487
Jul 15, 2015 13:26NellsRocks
Differentiating between Aegerine and Arfvedsonite from Mt. Malosa, Malawi
12
Joseph DOliveira
17577
Jul 10, 2015 08:35cascaillou
Mineral photography setups
11
Scott LaBorde
25617
Jun 29, 2015 11:10Scott LaBorde
Faces in this Hellín Sulphur Crystal
2
prcantos
6186
Jun 20, 2015 03:50prcantos
How to identify bruising on specimens
9
Casimir Sarisky
11514
Jun 16, 2015 15:54GneissWare
My first pocket!!!
3
Jared3339
8001
Jun 15, 2015 01:36Reinhardt van Vuuren
Crystallography of Fujian Garnets
8
prcantos
16470
Jun 11, 2015 04:50prcantos
Miller-Bravais Indices: really necessary?
7
prcantos
14325
May 07, 2015 16:00prcantos
Optical calcite spar
8
Roger Warin
13784
Mar 30, 2015 04:28Duncan Miller
What would cause the shape of this cavity?
8
DJandLIMON111
13816
Mar 23, 2015 10:36DJandLIMON111
What should I buy to start testing what Rocks/minerals i have
8
Alex Kaminski
11168
Feb 18, 2015 11:51cascaillou
Moved: 2014 - International year of crystallography: for example, pyrite.
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34
Roger Warin
12661
Dec 30, 2014 15:35Martin Rich
Among the rarest minerals
8
Roger Warin
14889
Dec 22, 2014 17:34Roger Warin
Why quartz parallel association is not a twin?
3
marco campos-venuti
6995
Dec 20, 2014 18:25Mark Ost
Old labels of minerals
9
Roger Warin
21415
Dec 05, 2014 18:41Montanpark
Stibnite bent at 90°
2
Roger Warin
6179
Nov 23, 2014 16:44Roger Warin
Crystallography of some Respina Mine diploid pyrites
4
prcantos
8593
Nov 11, 2014 17:36prcantos
Discussing the tutorial "DIY Specific Gravity Kit (tutorial) - (19)"
2
Jordi Fabre
6038
Nov 04, 2014 11:44cascaillou
Alteration of feldspar crystals in granite from Elba Island (Italy)
2
marco campos-venuti
6409
Nov 03, 2014 05:13marco campos-venuti
Formation of 'blue lace agate'
14
Duncan Miller
25480
Sep 30, 2014 01:09Duncan Miller
Barytocalcite synthesis : fluorescent or not?
1
Parvin
5175
Sep 20, 2014 16:06colin robinson
Thermal Decomposition of Calcium Carbonate
1
Parvin
5039
Sep 17, 2014 15:04Peter Megaw
Corundum var. Sapphire and Ruby from same locality
10
MSrockhound
19773
Sep 15, 2014 04:48ACC79
Orbicular Hematite, Keswick, Cumbria, UK
8
bugrock
12393
Sep 12, 2014 12:48bugrock
Manganese Carbonate
4
Parvin
8168
Sep 12, 2014 08:49Charlotte
Fluorapatite Synthesis
8
Parvin
12487
Sep 11, 2014 12:42Parvin
Fluorescent Fluorapatite
0
Parvin
5063
Sep 05, 2014 14:08Parvin
Brookite - Crystal habit.
1
Roger Warin
6541
Sep 05, 2014 04:29Mark Holtkamp
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