Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat Articles
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsThe ElementsUsersBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery


For education topics/questions 
Subject Posts Last Post

Are Certain Healing Crystals Toxic? Phenacite/Fluorite/ Infinite Stone

by Michele Wronski
18 07/16/2019 12:28AM
Last Post by cascaillou

Ebay shoppers BEWARE

by Michael Lambert II
2 07/14/2019 11:42PM
Last Post by Matthew Droppleman

"Reverse" fluid inclusion Attachments

by Mike Bowers
2 07/05/2019 07:30AM
Last Post by Jolyon & Katya Ralph

Texas Petrified “Snakewood”

by Julie McDonald
3 07/03/2019 06:31PM
Last Post by David Von Bargen

Blue fluorite from Quanzhou, Fujian, China fake?

by Niels van Velzen
5 07/02/2019 04:25PM
Last Post by Scott Rider

Handling/Saftey/Care of the Arsenate Group Minerals

by Ali U.
8 06/17/2019 05:08PM
Last Post by cascaillou

Those Wierd Symmetrical Granite Pebbles Attachments

by Matt Ciranni
13 06/07/2019 07:46PM
Last Post by Matt Ciranni

Selenite Gypsum VS Satin Spar Gypsum

by Dawn Markus
15 06/06/2019 12:02AM
Last Post by Catherine Costello


by Doug Hastings
22 05/30/2019 02:11PM
Last Post by Doug Hastings


by Melli Rose
5 05/23/2019 03:27PM
Last Post by Melli Rose
This topic has been moved.

Galaxy Moonstone Attachments

by Kathryn Horkley
  This topic has been moved.

Dolomite variety teruelite

by Erin Delventhal
40 05/16/2019 03:56PM
Last Post by Donald B Peck

Radio Shack Mineralogy Set Attachments

by J. Caleb Chappell
4 05/16/2019 04:13AM
Last Post by Doug Daniels

Your favorite mineralogy books

by Frank K. Mazdab
28 05/13/2019 01:24AM
Last Post by donovan wood (2)

how to repair stibnite

by Greg Simmons
12 05/12/2019 06:25PM
Last Post by cascaillou

Kaleidoscope Jasper Attachments

by cynthia peterson
12 05/06/2019 11:39PM
Last Post by Jeff "Mouse" Jessie

Mineral formula calculation application ADULARIA Attachments

by David Zakharov
5 05/06/2019 12:51AM
Last Post by David Zakharov
This topic has been moved.

Namibian Topaz Attachments

by Dominic Robertson
  This topic has been moved.

Copper cube modified by the trisoctahedron? Attachments

by Larry Maltby
13 05/04/2019 02:18AM
Last Post by Paul Brandes

Cheaply testing specimens for radiation

by Ali U.
18 04/27/2019 08:13PM
Last Post by Alysson Rowan

Edit in Helicon©

by Kevin Hean
1 04/27/2019 02:51PM
Last Post by Kevin Hean

Mineral labels

by Duane Leavitt
6 04/24/2019 10:23PM
Last Post by Jolyon & Katya Ralph

Report on the open pit mine wall collapse at Palabora Mine Attachments

by Kevin Conroy
4 04/23/2019 10:52PM
Last Post by Antoine Barthélemy

Marcasite in India and How To Identify One?

by Jacob Thomson Varghese
2 04/15/2019 09:15PM
Last Post by Łukasz Kruszewski

Remove native copper from rock? Attachments

by Deezeyener
16 04/14/2019 06:22PM
Last Post by Don Saathoff

If fluorite only forms in cubes what the heck have I been buying Attachments

by Amanda Morales
11 04/09/2019 10:17PM
Last Post by Łukasz Kruszewski

Phenakite Collector Question Attachments

by Christine Speckhart
15 03/26/2019 07:28PM
Last Post by Gregg Little

What constitutes an ore?

by Thomas Farley
15 03/18/2019 09:47PM
Last Post by Gregg Little
This topic has been moved.

Austinite or arsendescloizite Attachments

by Juan Ángel Tort Figueroa
  This topic has been moved.

Veracruz Amethyst 2 specimens big price difference.

by Chris Schlosser
7 03/17/2019 11:50PM
Last Post by Ali U.
This topic has been moved.

Fake? Heat treated? Attachments

by Kristi Hugs
  This topic has been moved.
This topic has been moved.

Is this green & brown quartz?? Attachments

by Chris Grosser
  This topic has been moved.


by Juan Ángel Tort Figueroa
3 03/12/2019 04:51AM
Last Post by Juan Ángel Tort Figueroa

Yttrium Fluorite

by Kristi Hugs
46 03/02/2019 03:28AM
Last Post by Spencer Seymour

Appraisal of Rough Sapphires? Attachments

by Ashley Mensching
2 02/27/2019 11:42PM
Last Post by Paul Brandes

Pegmatite question

by Olav Revheim
13 02/27/2019 04:30AM
Last Post by Doug Daniels

Best way to remove oil from Agates?

by Padraictheprince
5 02/23/2019 10:38PM
Last Post by Phil M. Belley

What does hydrogen peroxide clean

by D Mike Reinke
32 02/18/2019 10:54PM
Last Post by Donald B Peck

Holley Blue Agate Color Source

by Padraictheprince
5 02/10/2019 05:21PM
Last Post by Doug Schonewald

"Ema" Eggs Attachments

by Kristi Hugs
15 02/06/2019 04:42PM
Last Post by Kristi Hugs

Distorted forms in larger spinel crystals - is this a result of crystal growth or etching? Attachments

by Nick Gilly
14 02/04/2019 02:13AM
Last Post by Phil M. Belley

coral question

by Sean Munz
3 01/29/2019 01:17AM
Last Post by Sean Munz

New England Mineral Conference 2019 Attachments

by Jeffrey Morrison
1 01/26/2019 01:16AM
Last Post by Jeffrey Morrison

Stalactite vs. Stalagmite

by Ed Clopton
11 01/25/2019 01:11AM
Last Post by Paul Brandes

Insect inclusions in opal

by Hiro Inukai
1 01/24/2019 09:04PM
Last Post by Hiro Inukai

Carnelian Stalactite? Attachments

by Kristi Hugs
13 01/24/2019 08:02PM
Last Post by Kristi Hugs

Question about the tourmalines

by Becky Coulson
4 01/18/2019 09:06PM
Last Post by W. Richard Gunter

Inclusion inside Chalcedony Attachments

by mario tapilouw
8 01/16/2019 06:14AM
Last Post by mario tapilouw

Intro activity to rocks/minerals for kids

by Carlin Green
5 01/05/2019 01:45AM
Last Post by Keith Compton

Mendeleev and his mineral collection

by Herwig Pelckmans
3 01/04/2019 03:57PM
Last Post by Herwig Pelckmans

YouTube video tutorial on calculating mineral formulas using Excel

by Frank K. Mazdab
1 01/01/2019 02:58AM
Last Post by Frank K. Mazdab

Human activity creates 208 new mineral species

by Reiner Mielke
3 12/28/2018 11:36PM
Last Post by Łukasz Kruszewski

What happened to this copper cube? Attachments

by Larry Maltby
15 12/06/2018 02:49PM
Last Post by Larry Maltby

swarovski, water jet and laser.

by Chris Schlosser
3 12/04/2018 03:26PM
Last Post by Scott Rider

Displaying minerals

by Chris Schlosser
13 11/16/2018 03:04PM
Last Post by Luca Baralis
This topic has been moved.

Is it Antozonite? Attachments

by Eliza Ann Cua
  This topic has been moved.

How rare is Purple calcite and what is it’s value? Attachments

by Rachel Volkmann
4 11/05/2018 05:54PM
Last Post by Rachel Volkmann

Chert/chalcedony thin sections

by Norman King
20 11/05/2018 03:34AM
Last Post by Norman King

GSA Annual Conference

by Paul Brandes
5 11/03/2018 09:40PM
Last Post by Paul Brandes

Video of Missouri Mines State Historic Site

by Kevin Conroy
6 11/01/2018 02:45PM
Last Post by Kevin Conroy

Zeolites & Low temperature altered pegmatites

by Jobe Giles
8 10/31/2018 03:19PM
Last Post by Jobe Giles

kidney stone minerals

by Richard Gibson
11 10/31/2018 11:53AM
Last Post by Rolf Luetcke

Bow-tie stilbites: single crystals??

by Łukasz Kruszewski
11 10/31/2018 08:15AM
Last Post by Johan Kjellman

Amethyst "Globe"

by Kristi Hugs
7 10/30/2018 06:45PM
Last Post by Kristi Hugs

Are quartz and azeztulite the same thing?

by El Wood
7 10/30/2018 04:19PM
Last Post by A. Mathauser

Different Types of Hardness Measurements

by Kyle Bayliff
6 10/11/2018 10:35PM
Last Post by David Von Bargen

For those who would be interested in looking at thin sections of unusual rocks

by Frank K. Mazdab
17 10/07/2018 01:16AM
Last Post by Frank K. Mazdab

What form of radiation from uraninite?

by Ed Clopton
14 10/06/2018 07:43PM
Last Post by Alysson Rowan

Zacatecas hyalite opal - radioactive?

by Ashley Wolf
6 10/03/2018 09:12PM
Last Post by Hiro Inukai

pseudocubic quartz

by Jennifer Cindrich
39 10/03/2018 08:48PM
Last Post by Ronald J. Pellar

Stibiotantalite and Bismutotantalite Nomenclature

by Rudy Bolona
10 09/29/2018 09:31PM
Last Post by Pavel Kartashov

Help determining value of my amethyst? Attachments

by Evan Hoyer
4 09/27/2018 12:25AM
Last Post by John Kirtz

What is the most common mineral on Earth?

by Bob Harman
15 09/21/2018 03:17AM
Last Post by Kyle Bayliff

Nuclear Medical Imaging. How Radioactive Am I?

by Jenna Mast
11 09/20/2018 08:20PM
Last Post by Jenna Mast

Things I can do with coal?

by Sky Sanchez
19 09/20/2018 02:41AM
Last Post by Doug Daniels

strange chalcopyrite form Attachments

by Jennifer Cindrich
19 09/18/2018 01:32PM
Last Post by Harold Moritz

Sedimentary Chalcedon/Agate Attachments

by Noah Lunster
15 09/13/2018 03:19AM
Last Post by Rick Dalrymple

Zircon from Buncombe County, North Carolina Attachments

by Nick Ockham
4 09/12/2018 02:29PM
Last Post by Michael Lambert II

Benitoite question

by Jason Evans
7 09/11/2018 09:10PM
Last Post by Randy Johnson

crystal systems: nomenclature and conventions

by Daniel Atencio
16 09/06/2018 05:04PM
Last Post by Donald B Peck

Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2019, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: July 16, 2019 07:27:10
Go to top of page