We use cookies to show content based on your preferences. If you continue to browse you accept their use and installation. More information. >

FMF - Friends of Minerals Forum, discussion and message board
The place to share your mineralogical experiences


Spanish message board






Newest topics and users posts
17 May-03:14:23 Re: the mim museum in beirut, lebanon (Mim Museum)
16 May-08:20:07 Re: help with mineral identification in thin section from khibiny, kola peninsula (Daniel Garcia)
16 May-05:41:19 Re: help with mineral identification in thin section from khibiny, kola peninsula (Duncan Miller)
16 May-03:20:17 Re: help with mineral identification in thin section from khibiny, kola peninsula (Daniel Garcia)
16 May-01:49:42 Re: help with mineral identification in thin section from khibiny, kola peninsula (Duncan Miller)
15 May-22:21:35 Re: collection of volkmar stingl (Volkmar Stingl)
15 May-17:34:35 Gilbert gauthier - silvia's collection (Silvia)
15 May-09:05:40 Re: the mim museum in beirut, lebanon (Mim Museum)
15 May-06:13:55 Re: monthly mineral chronicles, mineral guides and more... (Crocoite)
15 May-02:23:13 The mizunaka collection - quartz (Am Mizunaka)
14 May-15:59:22 Re: help with mineral identification in thin section from khibiny, kola peninsula (Daniel Garcia)
14 May-12:47:43 Re: help with mineral identification in thin section from khibiny, kola peninsula (Pete Modreski)
14 May-12:03:14 Re: collection of volkmar stingl (Volkmar Stingl)
14 May-10:40:37 Help with mineral identification in thin section from khibiny, kola peninsula (Daniel Garcia)
14 May-10:25:53 Re: what is it? (Janjasina)
13 May-16:53:55 Re: silvia's collection (Silvia)
13 May-13:18:46 Re: elbaite, ending moor's head (Daniel Garcia)
13 May-10:19:46 Re: what is it? (Amir Akhavan)
13 May-10:18:08 Re: what is it? (Alfredo)
13 May-08:22:44 Re: collection of firmo espinar (Firmo Espinar)
13 May-08:22:07 Re: what is it? (Bob Morgan)
13 May-08:16:44 Re: what is it? (Firmo Espinar)
13 May-07:38:51 Re: what is it? (Fiebre Verde)
13 May-07:02:33 What is it? (Janjasina)
12 May-17:12:47 Re: silvia's collection (Firmo Espinar)

For lists of newest topics and postings click here


RSS RSS

View unanswered posts

Why and how to register

Index Index
 FAQFAQ RegisterRegister  Log inLog in
 {Forgotten your password?}Forgotten your password?  

Like
93396


The time now is May 17, 2022 22:02

Search for a textSearch for a text   

A general guide for using the Forum with some rules and tips
The information provided within this Forum about localities is only given to allow reference to them. Any visit to any of the localities requires you to obtain full permission and relevant information prior to your visit. FMF is strictly against any illicit activities related to collecting minerals.
Search found 4 matches
Index
Author Message
  Topic: Conditions where pyrite/pyritohedra are formed
LDMarks

Replies: 16
Views: 5007

PostForum: Minerals and Mineralogy   Posted: Oct 06, 2021 22:00   Subject: Re: Conditions where pyrite/pyritohedra are formed
Some useful information in these responses, thanks everyone.

To clarify a couple of points [1] as someone who has worked on this a bit, it is very possible to have a population of different crystal ...
  Topic: Conditions where pyrite/pyritohedra are formed
LDMarks

Replies: 16
Views: 5007

PostForum: Minerals and Mineralogy   Posted: Sep 30, 2021 14:26   Subject: Conditions where pyrite/pyritohedra are formed
I am looking for information about the conditions under which pyrite forms pyritohedral or icosahedral single crystals. The first is when {210} facets are favored; the second is when both {210} and {1 ...
  Topic: About cyclic twinning - (5)
LDMarks

Replies: 144
Views: 221125

PostForum: Featured Columns of FMF   Posted: Aug 06, 2021 13:56   Subject: Re: About cyclic twinning - (5)
If grown by, for instance, vapor deposition then every fcc metal can produce fivelings and also icosahedra -- not as naturally formed minerals though. From Goldschmidt's atlas I found naturally occuri ...
  Topic: About cyclic twinning - (5)
LDMarks

Replies: 144
Views: 221125

PostForum: Featured Columns of FMF   Posted: Aug 05, 2021 11:10   Subject: Re: About cyclic twinning - (5)
I am looking for nice examples of fivelings, either images or references earlier than 1960 (in particular any in the 1800's). Any links very much appreciated.
 
Page 1 of 1
All times are GMT - 5 Hours
Jump to:  


All pictures, text, design © Forum FMF 2006-2022


Powered by FMF