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
24 Oct-09:37:12 Re: collection of volkmar stingl (Volkmar Stingl)
24 Oct-09:28:16 Re: collection of michael shaw (Volkmar Stingl)
24 Oct-09:04:01 Re: collection of michael shaw (Michael Shaw)
24 Oct-03:54:43 Re: collection of tobi (Dany Mabillard)
24 Oct-03:50:24 Re: collection of tobi (Tobi)
23 Oct-23:28:11 Re: help found with american indian items (Philippe Durand)
23 Oct-15:08:16 Silvia's collection - classic portugese ferberite (Silvia)
23 Oct-13:59:45 Re: help found with american indian items (Lou B.)
23 Oct-13:56:06 Help found with american indian items (Lou B.)
23 Oct-13:45:52 Re: collection of tobi (Tobi)
23 Oct-12:29:41 Re: munich show (mineralientage) 2021 (Jordi Fabre)
23 Oct-12:23:20 Munich show (mineralientage) 2021 - like a new show (Jordi Fabre)
23 Oct-11:54:58 Re: collection of tobi (Tobi)
23 Oct-09:31:25 Re: munich show (mineralientage) 2021 (James Catmur)
23 Oct-04:07:52 Re: new generation for picture - ploum (Ploum)
23 Oct-01:16:33 Re: new generation for picture - ploum (Ploum)
22 Oct-23:13:53 Re: collection of volkmar stingl (Volkmar Stingl)
22 Oct-20:05:22 Re: new generation for picture - ploum (Silvia)
22 Oct-16:40:52 Re: don lum collection (Don Lum)
22 Oct-14:56:10 Re: don lum collection (Silvia)
22 Oct-14:10:58 Re: don lum collection (Don Lum)
22 Oct-13:40:23 Re: collection of sante celiberti (Sante Celiberti)
22 Oct-12:50:16 Re: new generation for picture - ploum (Ploum)
22 Oct-12:25:00 Re: collection of firmo espinar (Firmo Espinar)
22 Oct-09:04:03 Re: collection of michael shaw (Michael Shaw)

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
85945


The time now is Oct 24, 2021 11:05

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.
Unknown mineral from Pikes Peak pegmatite
  Goto page Previous  1, 2
  Index -> What is it? - Where is it from?
Like
9


View previous topic :: View next topic  
Author Message

Bob Carnein




Joined: 22 Aug 2013
Posts: 257
Location: Florissant, CO


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jun 14, 2021 09:55    Post subject: Re: Unknown mineral from Pikes Peak pegmatite  

I tried scratching a very flat rhombohedron face on a "Herkimer diamond", and the unknown mineral left some powder and a VERY faint scratch.
Back to top
Reply to topic Reply with quote
Like
   

Peter Lemkin




Joined: 18 Nov 2016
Posts: 357
Location: Prague

View user's profile

Send private message

PostPosted: Jun 15, 2021 00:11    Post subject: Re: Unknown mineral from Pikes Peak pegmatite  

Since you live not far from where you collected, as you probably know, there are a number of regional experts between where you live and Colo. Springs. If I were you, I'd show it to one or a few of them. One shop in Manatou Springs has some experts in the area, but there are others - some without shops. Just an idea. Perhaps some here can help, but most of us are not local. I used to be living in CO and collected at Devil's Head and that general area often. Never saw anything like you have, but in that P.P. Pegmatite every now and then one would find a very nicely formed XX of a mineral rarely found.....
Back to top
Reply to topic Reply with quote
Like
   

Bob Carnein




Joined: 22 Aug 2013
Posts: 257
Location: Florissant, CO


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 22, 2021 09:56    Post subject: Re: Unknown mineral from Pikes Peak pegmatite  

I was able to break this crystal into two fragments, preserving the termination. I sent the bottom half to John Attard, who completed an XRD analysis (attached), which indicates that it's quartz. Now the problem is how to explain the crystal habit and forms present. This was a completely unexpected result.
Back to top
Reply to topic Reply with quote
Like
   

Bob Morgan




Joined: 18 Jan 2018
Posts: 158
Location: Savannah, Georgia


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jul 23, 2021 09:03    Post subject: Re: Unknown mineral from Pikes Peak pegmatite  

Quartz does take this habit sometimes. I've heard the nickname of 'saber quartz' for that. Two opposing prism faces are very narrow or completely missing causing it to have a pseudo orthorhombic appearance, hence looking like danburite. It's an oddity and thus highly desirable to certain quartz fanatics. Good find.
Back to top
Reply to topic Reply with quote
Like
2
   
Display posts from previous:   
   Index -> What is it? - Where is it from?   All times are GMT - 5 Hours
Page 2 of 2
  Goto page Previous  1, 2  

 
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 2006-2021


Powered by FMF