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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

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
This topic has been moved.

Radioactive green crystal, Juab Co Utah Attachments

by Amy Morishita
  This topic has been moved.

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
  This topic has been moved.

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
This topic has been moved.

Mineral identification

by Michael Phillipe
  This topic has been moved.

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
  This topic has been moved.
This topic has been moved.

Is Picture Jasper really Jasper?

by Robert Darabos
  This topic has been moved.
This topic has been moved.

Please help identify Attachments

by Candace Vialpando
  This topic has been moved.
This topic has been moved.

Help Identifying a "fuzzy" mineral from Namibia Attachments

by Christine Domino (2)
  This topic has been moved.

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
  This topic has been moved.
This topic has been moved.

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

by Ashok Shaw
  This topic has been moved.
This topic has been moved.

Anyone know what this is? Attachments

by Danielle Nicole Stone
  This topic has been moved.

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
This topic has been moved.

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
  This topic has been moved.
This topic has been moved.

Please help with ID Attachments

by Debbie Forrester
  This topic has been moved.

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
  This topic has been moved.

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
This topic has been moved.

Millerite Cleavage Angles

by John Collins
  This topic has been moved.

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

Cs-bearing beryl evolving to pezzottaite from the Julianna Pegmatitic System SW Poland

by Marco E. Ciriotti
1 01/05/2017 09:38AM
Last Post by Marco E. Ciriotti

Crystal structure of nickelskutterudite (with revised formula)

by Marco E. Ciriotti
1 01/05/2017 09:34AM
Last Post by Marco E. Ciriotti

Structure refinement and vibrational spectroscopy of vauxite from type-locality

by Marco E. Ciriotti
1 01/05/2017 09:33AM
Last Post by Marco E. Ciriotti

Revision of the crystal structure and formula of bafertisite

by Marco E. Ciriotti
1 01/05/2017 09:31AM
Last Post by Marco E. Ciriotti

New data for chiavennite and ferrochiavennite

by Marco E. Ciriotti
1 01/05/2017 09:30AM
Last Post by Marco E. Ciriotti
This topic has been moved.

Dushan Jade

by Anonymous User
  This topic has been moved.

Classification book/field guide

by Isaac Carman
26 12/28/2016 09:05PM
Last Post by Ralph Bottrill
This topic has been moved.

Is this translucent stone cryptocrytallin red chert. With manganese

by Michael Harwell
  This topic has been moved.

Concerning diopside from Merelani Hills, Tanzania

by Timothy Blackwood
8 12/25/2016 12:37AM
Last Post by Ralph Bottrill
This topic has been moved.

Help ID #2 Attachments

by Frank Festa
  This topic has been moved.
This topic has been moved.

Help ID #1 Attachments

by Frank Festa
  This topic has been moved.
This topic has been moved.

Blue mineral What is it? Attachments

by Nancy Gerlach
  This topic has been moved.
This topic has been moved.

Unobtainium defined Attachments

by Reiner Mielke
  This topic has been moved.

wurtzite and the IMA

by Chris Stefano
61 12/01/2016 05:50PM
Last Post by Joshua Chambers

Crystal chemistry of a Ba-dominant analogue of hydrodelhayelite

by Marco E. Ciriotti
1 11/22/2016 04:06PM
Last Post by Marco E. Ciriotti

Hakite from Příbram, Czech Republic: Compositional variability, crystal structure and the role within the Se - mineralization

by Marco E. Ciriotti
1 11/08/2016 10:14AM
Last Post by Marco E. Ciriotti
This topic has been moved.

Gogunzulla

by Sister Elias Freeman, OSB.Sol
  This topic has been moved.

Order–Disorder character of owyheeite

by Marco E. Ciriotti
2 10/21/2016 12:33PM
Last Post by Chester S. Lemanski, Jr.

Hydrogen bonding and structural complexity in the pseudomalachite, ludjibaite, reichenbachite polymorphs

by Marco E. Ciriotti
2 10/21/2016 12:31PM
Last Post by Chester S. Lemanski, Jr.

I was told this is blue barite from Morocco but I'm skeptical... Attachments

by DL
11 10/17/2016 10:35PM
Last Post by DL

The crystal structure of uytenbogaardtite and its relationships with gold and silver sulfides-selenides

by Marco E. Ciriotti
2 10/15/2016 06:11PM
Last Post by Uwe Kolitsch
This topic has been moved.

Need help with feldspar classification Attachments

by Jobadiah Giles
  This topic has been moved.

Crystal structure of synthetic alunite-type chromates

by Uwe Kolitsch
1 09/19/2016 06:03PM
Last Post by Uwe Kolitsch



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