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Mineralogical Classification

The scientific classification of mineral species. For ID questions see Identity Help in How To section 
Subject Posts Last Post
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Mineral determine Attachments

by gold9999
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Metallic Mineral Classification Attachments

by Robert Pummell
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Crystal structure and phase transition in noelbensonite: a multi-methodological study

by Marco E. Ciriotti
1 07/16/2017 09:14AM
Last Post by Marco E. Ciriotti

Ferrosilite

by Jolyon & Katya Ralph
4 07/06/2017 06:28PM
Last Post by Tony Nikischer
This topic has been moved.

Geode Rock for Identification

by Ben nko
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Structure refinements of kamchatkite and alumoklyuchevskite

by Marco E. Ciriotti
1 06/30/2017 05:46PM
Last Post by Marco E. Ciriotti

Crystal chemistry of Al–V–Cr oxy-tourmalines from Sludyanka complex, Lake Baikal, Russia

by Marco E. Ciriotti
1 06/30/2017 05:29PM
Last Post by Marco E. Ciriotti

Modularity of crystal structures: a unifying model for the biopyribole–palysepiole series

by Marco E. Ciriotti
1 06/30/2017 05:25PM
Last Post by Marco E. Ciriotti

A new uranyl phosphate sheet in the crystal structure of furongite

by Marco E. Ciriotti
1 06/30/2017 05:22PM
Last Post by Marco E. Ciriotti

Crystal-chemical relations and classification problems belonging to the oxy-schorl – oxy-dravite – bosiite – povondraite series

by Marco E. Ciriotti
1 06/30/2017 05:19PM
Last Post by Marco E. Ciriotti
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La Marina Mine, Mun. de Pauna, Boyacá Department, Colombia

by Milton Dye
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mica Attachments

by jeff d martin
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Composition of Puzzler Mine Vanadinite

by Timothy Blackwood
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Hydrogen bonding and structural complexity of the Cu3(AsO4)(OH)3 polymorphs (clinoclase, gilmarite): a theoretical study

by Marco E. Ciriotti
1 06/13/2017 04:06PM
Last Post by Marco E. Ciriotti

Polytypism of cronstedtite from Chyňava, Czech Republic

by Marco E. Ciriotti
1 06/13/2017 04:04PM
Last Post by Marco E. Ciriotti

Crystal structure of the (REE)-uranyl carbonate mineral shabaite-(Nd)

by Marco E. Ciriotti
1 06/13/2017 04:02PM
Last Post by Marco E. Ciriotti

New crystallographic data and formula revision of phuralumite

by Marco E. Ciriotti
1 06/13/2017 04:00PM
Last Post by Marco E. Ciriotti

Decomposition of konyaite: CO2 fixation in mine tailings

by Marco E. Ciriotti
5 06/13/2017 12:05AM
Last Post by Stuart Mills

Crystal chemistry of oxo-mangani-leakeite and mangano-mangani ungarettiite

by Marco E. Ciriotti
1 06/12/2017 07:39AM
Last Post by Marco E. Ciriotti
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Rhodochrosite from ??? Attachments

by ryan christensen
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How to define, redefine or discredit a mineral species?

by Stuart Mills
1 06/06/2017 02:35AM
Last Post by Stuart Mills

mindat confusion about approved vs. grandfather status

by Johan Kjellman
5 06/05/2017 06:10PM
Last Post by David Von Bargen

Revision of the crystal structure of jinshajiangite

by Marco E. Ciriotti
1 05/31/2017 09:13AM
Last Post by Marco E. Ciriotti

Crystal chemistry of the wyllieite group of phosphates

by Marco E. Ciriotti
1 05/27/2017 10:19AM
Last Post by Marco E. Ciriotti

Crystal-chemistry of bjarebyite, BaMn2+2Al2(PO4)3(OH)3, from the Palermo #1 pegmatite

by Marco E. Ciriotti
1 05/27/2017 10:18AM
Last Post by Marco E. Ciriotti
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Radioactive green crystal, Juab Co Utah Attachments

by Amy Morishita
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Crystal structure of the (REE)-uranyl carbonate mineral kamotoite-(Y)

by Marco E. Ciriotti
1 05/26/2017 12:46PM
Last Post by Marco E. Ciriotti
This topic has been moved.

I need help with malachite Attachments

by Vera Velini
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Structural phase transitions of clinoatacamite

by Uwe Kolitsch
1 05/23/2017 06:52PM
Last Post by Uwe Kolitsch

Crystal structure determination of honeaite

by Marco E. Ciriotti
1 05/20/2017 09:29AM
Last Post by Marco E. Ciriotti

Crystal structure refinement of duftite, PbCu(AsO4)(OH), from Grube Clara, Oberwolfach, Schwarzwald, Germany

by Uwe Kolitsch
1 05/18/2017 09:21AM
Last Post by Uwe Kolitsch
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Mineral identification

by Michael Phillipe
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Evidence of cross-cutting and redox reaction in Khatyrka meteorite reveals metallic-Al minerals formed in outer space Attachments

by Marco E. Ciriotti
2 05/09/2017 02:35PM
Last Post by Kyle Beucke

Ordered distribution of Cu and Ag in the crystal structure of balkanite

by Marco E. Ciriotti
1 05/05/2017 06:24PM
Last Post by Marco E. Ciriotti
This topic has been moved.

EDS question Attachments

by jennifer cindrich
  This topic has been moved.

Denisovite structure

by Marco E. Ciriotti
1 05/02/2017 02:20PM
Last Post by Marco E. Ciriotti

Abelsonite structure

by Marco E. Ciriotti
1 05/02/2017 01:58PM
Last Post by Marco E. Ciriotti
This topic has been moved.

I am Chevkinite. What is your opinion?? Attachments

by Osman Khattak
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Is Picture Jasper really Jasper?

by Robert Darabos
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Please help identify Attachments

by Candace Vialpando
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Help Identifying a "fuzzy" mineral from Namibia Attachments

by Christine Domino (2)
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Nomenclature of the perovskite supergroup

by Marco E. Ciriotti
2 04/13/2017 12:21AM
Last Post by Stuart Mills
This topic has been moved.

Location for large calcite Attachments

by Casper Voogt
  This topic has been moved.

Garnets in the majorite–pyrope system: symmetry, lattice microstrain, and order–disorder of cations

by Marco E. Ciriotti
1 04/07/2017 09:06AM
Last Post by Marco E. Ciriotti

Coloration of natural zircon

by Uwe Kolitsch
1 04/06/2017 04:41PM
Last Post by Uwe Kolitsch

Refinement of the crystal structure of schneiderhöhnite

by Marco E. Ciriotti
1 04/05/2017 07:35AM
Last Post by Marco E. Ciriotti

Crystal structure of veenite

by Marco E. Ciriotti
2 04/03/2017 04:05PM
Last Post by Uwe Kolitsch

Incommensurately modulated twin structure of nyerereite

by Marco E. Ciriotti
2 04/03/2017 04:05PM
Last Post by Uwe Kolitsch

Crystal structure of mineral fibres: 2. Amosite and fibrous anthophyllite

by Marco E. Ciriotti
1 04/03/2017 10:48AM
Last Post by Marco E. Ciriotti
This topic has been moved.

In Phoenixville, Pa yesterday here are some minerials I can't figure out. The blue green material is waxy. There was a lot of coal around.

by Eric Yeremian
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Calculation of FeO and Fe2O3 wt% from Fe2O3 value obtained from XRF analysis Attachments

by Ashok Shaw
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Anyone know what this is? Attachments

by Danielle Nicole Stone
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Structure refinement and crystal chemistry of tokkoite and tinaksite from Murun massif (Russia)

by Marco E. Ciriotti
5 03/03/2017 10:15AM
Last Post by Joel Dyer
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Otavite best analysis method

by Jim Robison
  This topic has been moved.
This topic has been moved.

Citrine Table Appraisal - is it citrine? Attachments

by Thalia Castillo
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Please help with ID Attachments

by Debbie Forrester
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The Red Emerald

by Seth William Rozendaal
21 02/15/2017 01:00AM
Last Post by Seth William Rozendaal

"Alumosauconite" from Silver Coin, Nevada

by Marco E. Ciriotti
1 02/14/2017 12:50PM
Last Post by Marco E. Ciriotti

IMA 2015-B = astrophyllite supergroup: nomenclature and classification

by Marco E. Ciriotti
1 02/14/2017 11:05AM
Last Post by Marco E. Ciriotti
This topic has been moved.

Negative crystals and their formation Attachments

by Donn Cuson
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Order of [6]Ti4+ in a Ti-rich calcium amphibole from Kaersut, Greenland

by Marco E. Ciriotti
1 02/09/2017 08:38AM
Last Post by Marco E. Ciriotti
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Millerite Cleavage Angles

by John Collins
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Lazurite is the same mineral as Haüyne ?

by Uwe Ludwig
42 01/30/2017 09:16PM
Last Post by Ralph Bottrill

Modelling of substitutional defects in the structure of Ti-bearing hibonite

by Marco E. Ciriotti
2 01/29/2017 05:34PM
Last Post by Uwe Kolitsch
This topic has been moved.

Rough Diamond in Kimberlite conglomerate??? Attachments

by Heather Marie Reid
  This topic has been moved.

Si-deficient, OH-substituted, boron-bearing vesuvianite from Sakha-Yakutia

by Marco E. Ciriotti
1 01/20/2017 10:20AM
Last Post by Marco E. Ciriotti

New occurrence of Ni-rich horomanite from the Kouyama gabbro, Japan

by Marco E. Ciriotti
1 01/18/2017 09:31AM
Last Post by Marco E. Ciriotti

Structural refinement of köttigite–parasymplesite solid solution

by Marco E. Ciriotti
1 01/18/2017 09:29AM
Last Post by Marco E. Ciriotti

Cation ordering of {110} and {211} sectors in "grandite" garnet from Mali

by Marco E. Ciriotti
1 01/18/2017 09:28AM
Last Post by Marco E. Ciriotti
This topic has been moved.

Anyone familiar with druzy quartz conglomerates?

by Dustin Ryan Alexander
  This topic has been moved.

Hydroxycalciopyrochlore from a regionally metamorphic marble at Bližná, Czech Republic

by Marco E. Ciriotti
1 01/11/2017 06:26PM
Last Post by Marco E. Ciriotti

Hydrogen-bonding system in amarillite

by Marco E. Ciriotti
1 01/11/2017 06:24PM
Last Post by Marco E. Ciriotti

Crystal structure and new formula of rameauite

by Marco E. Ciriotti
1 01/11/2017 06:23PM
Last Post by Marco E. Ciriotti

Partzite discreditation

by Marco E. Ciriotti
1 01/11/2017 06:16PM
Last Post by Marco E. Ciriotti

Crystal chemistry of lamprophyllite-related minerals

by Marco E. Ciriotti
1 01/11/2017 06:15PM
Last Post by Marco E. Ciriotti

Hydrogen bond system and vibrational spectroscopy of fibroferrite

by Marco E. Ciriotti
1 01/11/2017 06:14PM
Last Post by Marco E. Ciriotti

Si-deficient, OH-substituted, boron-bearing vesuvianite from Sakha-Yakutia

by Marco E. Ciriotti
1 01/11/2017 05:46PM
Last Post by Marco E. Ciriotti
This topic has been moved.

Distinguishing sedimentary from volcanic rocks

by Isaac Carman
  This topic has been moved.

Revised and expanded structure hierarchy of natural and synthetic hexavalent uranium compounds

by Marco E. Ciriotti
5 01/09/2017 11:23AM
Last Post by Luís Martins

Understanding the crystal chemistry of barium In TS-block minerals

by Marco E. Ciriotti
1 01/05/2017 09:42AM
Last Post by Marco E. Ciriotti



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