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
29 Nov-10:25:15 Re: the mizunaka collection (Alshawani)
29 Nov-08:54:10 Re: collection of tobi (Carles Millan)
29 Nov-07:58:50 Honeymoon quartz (James Catmur)
29 Nov-07:29:42 Re: collection of tobi (Tobi)
29 Nov-07:21:33 Re: collection of annemieke en rob schnerr (Tobi)
29 Nov-07:09:56 Re: collection of philippe durand (Tobi)
29 Nov-02:05:11 Re: collection of philippe durand (Philippe Durand)
29 Nov-01:05:07 Re: collection of volkmar stingl (Volkmar Stingl)
28 Nov-15:56:08 Re: collection of annemieke en rob schnerr (Rob Schnerr)
28 Nov-14:02:49 Re: collection of volkmar stingl (Volkmar Stingl)
28 Nov-11:30:34 Re: collection of philippe durand (Volkmar Stingl)
28 Nov-06:23:37 Re: collection of philippe durand (Sante Celiberti)
28 Nov-06:20:07 Re: collection of philippe durand (Philippe Durand)
28 Nov-02:53:09 The mizunaka collection - scorodite (Am Mizunaka)
27 Nov-23:32:55 Re: presentation of new members - alain abreal from france, passionate about minerals (Roger Warin)
27 Nov-16:11:43 Re: collection of sante celiberti (Sante Celiberti)
27 Nov-14:09:51 Re: presentation of new members - alain abreal from france, passionate about minerals (Philippe Durand)
27 Nov-13:32:49 Mineral talks live - episode 22 - katherine dunnell; earth sci tech, royal ontario museum (Bluecapproductions)
27 Nov-12:38:14 Re: collection of firmo espinar (Firmo Espinar)
27 Nov-11:36:57 Re: presentation of new members - alain abreal from france, passionate about minerals (Don Lum)
27 Nov-09:20:07 Re: collection of volkmar stingl (Volkmar Stingl)
27 Nov-04:03:46 Presentation of new members - alain abreal from france, passionate about minerals (Alain.Abreal)
26 Nov-23:39:28 Re: cylindrical calcite crystal? (Shravigunjal)
26 Nov-18:12:10 Popular minerals - ludlamite from amazonas, brazil (Jordi Fabre)
26 Nov-14:21:31 Re: collection of annemieke en rob schnerr (Sante Celiberti)

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
75138


The time now is Nov 29, 2020 10:48

Search for a textSearch for a text   

A general guide for using the Forum with some rules and tips
Idiomorphic ruby crystal
  
  Index -> Minerals and Mineralogy
Like
6


View previous topic :: View next topic  
Author Message

Roger Warin




Joined: 23 Jan 2013
Posts: 975


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Oct 23, 2020 16:22    Post subject: Idiomorphic ruby crystal  

Here is a small perfect ruby whose origin is Malagasy.
I think it's rare to see such an idiomorphic ruby crystal showing off its crystalline class so well.
It illustrates the cover of the monthly newsletter that I publish every month.
In a previous issue I had considered corundum from a general point of view, but also to present its two varieties of color, sapphire and ruby.
On this occasion, I tried to think outside the box by explaining the light absorption mechanisms that produce these colors.
Obviously, I had discussed Fe2 + / Ti4 + charge transfers for sapphire (17 pages).
The November issue of the bulletin explains the ruby (14 pages), in the same way, except that the charge transfer is between O2- / Cr3 +.



Corindon-ruby_Madagascar_R.jpg
 Mineral: Ruby
 Locality:
Ambohimandrosoa, Antanifotsy District, Vakinankaratra Region, Antananarivo Province, Madagascar
 Description:
 Viewed:  362 Time(s)

Corindon-ruby_Madagascar_R.jpg


Back to top
Reply to topic Reply with quote
Like
6
   
Display posts from previous:   
   Index -> Minerals and Mineralogy   All times are GMT - 5 Hours
Page 1 of 1
    

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


All pictures, text, design © Forum FMF 2006-2020


Powered by FMF