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
04 Oct-16:42:58 The mizunaka collection - fluorapatite (Am Mizunaka)
04 Oct-15:33:40 Re: the mizunaka collection - elbaite (Am Mizunaka)
04 Oct-14:57:50 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (James Catmur)
04 Oct-13:28:01 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Peter Megaw)
04 Oct-12:51:59 Re: collection of michael shaw (Michael Shaw)
04 Oct-10:55:34 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Leofwin)
04 Oct-10:33:42 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Peter Megaw)
04 Oct-10:22:56 Re: presentation of new members - tobi (leofwin) from dresden, germany (Don Lum)
04 Oct-09:58:41 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Pete Richards)
04 Oct-09:48:00 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Leofwin)
04 Oct-09:28:52 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Lluis)
04 Oct-09:25:31 Re: dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Bob Carnein)
04 Oct-09:18:14 Dark, metallic mystery mineral - magnetite? ilmenite? hematite? (Leofwin)
04 Oct-08:21:04 Re: munich show (mineralientage) 2022 (Tobi)
04 Oct-08:00:04 Re: presentation of new members - tobi (leofwin) from dresden, germany (Tobi)
04 Oct-06:47:48 Presentation of new members - tobi (leofwin) from dresden, germany (Leofwin)
03 Oct-23:39:50 Re: munich show (mineralientage) 2022 (Roger Warin)
03 Oct-23:19:35 Re: collection of volkmar stingl (Volkmar Stingl)
03 Oct-14:30:46 Re: collection of tobi (Carles Millan)
03 Oct-13:55:58 Re: collection of tobi (Michael Shaw)
03 Oct-12:39:21 The boldut mine - silvia's collection (Silvia)
03 Oct-12:16:00 Re: collection of tobi (Tobi)
03 Oct-12:13:45 Re: collection of tobi (Tobi)
03 Oct-12:10:54 Re: collection of tobi (James Catmur)
03 Oct-11:59:36 Re: collection of tobi (Tobi)

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
96599


The time now is Oct 04, 2022 17:10

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 3 matches
Index
Author Message
  Topic: Twinned Topaz?
Yannick Cosson

Replies: 8
Views: 1855

PostForum: What is it? - Where is it from?   Posted: Aug 14, 2022 10:42   Subject: Re: Twinned Topaz?
Hello, I made the test SG specific gravity: the result is 3,4 and it is the SG of TOPAZ.

In fact I have another smaller sample (2x1) from another locality: Air Niger mountains, collected in the 70s ...
  Topic: Twinned Topaz?
Yannick Cosson

Replies: 8
Views: 1855

PostForum: What is it? - Where is it from?   Posted: Jul 01, 2022 10:15   Subject: Re: Twinned Topaz?
Your photo shows no faces. It appears that the free ends of both crystals are damaged. Are there good sharp crystal faces anywhere, and could you show them (as many as possible) in a photograph?

...
  Topic: Twinned Topaz?
Yannick Cosson

Replies: 8
Views: 1855

PostForum: What is it? - Where is it from?   Posted: Jul 01, 2022 05:07   Subject: Twinned Topaz?
Twinned Topaz from Brazil. 4x3 cms. Twin in V like a bertrandite crystal ? But the twins for topaz crystals are rare and poorly documented: is it a topaz crystal?
 
Page 1 of 1
All times are GMT - 5 Hours
Jump to:  


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


Powered by FMF