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

FMF English Forum is moderated by John S. White and Peter Megaw
 

Spanish message board






Newest topics and users posts
19 Aug-08:34:17 Re: ferberite, pyrite, siderite, and..... ? (Mathias)
19 Aug-08:29:08 Crystal cavity + green vein poss. Chlorite? (Kara)
19 Aug-07:43:35 Re: ferberite, pyrite, siderite, and..... ? (Jordi Fabre)
19 Aug-07:28:02 Re: mineral id help. (Jordi Fabre)
19 Aug-05:20:23 Re: mineral id help. (John S. White)
19 Aug-05:12:35 Re: abrasives repairing polishing crystals (Diamond)
19 Aug-04:02:54 Re: abrasives repairing polishing crystals (Duncan Miller)
19 Aug-03:36:59 Re: collection of philippe durand (Philippe Durand)
19 Aug-03:13:14 Ferberite, pyrite, siderite, and..... ? (Mathias)
18 Aug-20:28:11 Re: mineral id help. (Robson Vieira)
18 Aug-20:23:32 Re: mineral id help. (Robson Vieira)
18 Aug-20:03:09 Question about fluorite on quartz (Protium)
18 Aug-19:41:05 Re: breakfast with minerals - podcast discussion - episode 02 (Bluecapproductions)
18 Aug-17:38:21 Re: mineral id help. (Justin Hickok)
18 Aug-17:34:53 Re: abrasives repairing polishing crystals (Marco Campos-venuti)
18 Aug-17:16:07 Re: we celebrate the 12th anniversary of the beginning of fmf! (Fiebre Verde)
18 Aug-17:07:55 Re: mineral id help. (Bob Harman)
18 Aug-17:02:03 Re: mineral id help. (John Betts)
18 Aug-16:57:00 Re: mineral id help. (Justin Hickok)
18 Aug-16:49:58 Re: mineral id help. (Nick_g)
18 Aug-16:49:58 Re: mineral id help. (Tom Tucker)
18 Aug-16:22:06 Re: could anyone identify this stone? (Tom Tucker)
18 Aug-16:18:04 Mineral id help. (Robson Vieira)
18 Aug-16:11:23 Re: what is this ? (Paulmccabe1188)
18 Aug-15:59:32 Re: what is this ? (Justin Hickok)

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
44948


The time now is Aug 19, 2018 08:35

Search for a textSearch for a text   

A general guide for using the Forum with some rules and tips
Biotite?? Not sure what this
  
  Index -> FOR BEGINNERS: What is it? Where is it from?
Like


View previous topic :: View next topic  
Author Message

James W




Joined: 23 Apr 2018
Posts: 7
Location: Texas

View user's profile

Send private message

PostPosted: Apr 23, 2018 17:11    Post subject: Biotite?? Not sure what this  

Hey all, beginner to this, any help would be greatly appreciated. Found a leaf of gold/silvery/Black lustrous mineral on quartz. I have been researching pretty heavily and have done a few very basic tests. The mineral is not magnetic, based on a very small flake I had removed with skewer and is on the exterior what I think is a piece of quartz/granite. The rock was found in a stream wash in Central TX. The shine does not appear to fade too much in shade. Any ideas??

Thank you!



314AA55E-12E2-4403-A6AD-900E54478CE7.jpeg
 Locality:
Texas, USA
 Dimensions: 20mm
 Description:
 Viewed:  828 Time(s)

314AA55E-12E2-4403-A6AD-900E54478CE7.jpeg


Back to top
Reply to topic Reply with quote
Like
   

James W




Joined: 23 Apr 2018
Posts: 7
Location: Texas

View user's profile

Send private message

PostPosted: Apr 23, 2018 17:27    Post subject: Re: Biotite?? Not sure what this  

Sorry for the poorly written summary 👎
Back to top
Reply to topic Reply with quote
Like
   

Matt_Zukowski
Site Admin



Joined: 10 Apr 2009
Posts: 604
Location: Alaska


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Apr 23, 2018 17:37    Post subject: Re: Biotite?? Not sure what this  

The picture is too fuzzy to help with identification. Nevertheless, you describe the material as flaky and if it is black it would be safe to assume that it is biotite. If you want more certainty from us, please post a better picture. Thanks.
Back to top
Reply to topic Reply with quote
Like
   

James W




Joined: 23 Apr 2018
Posts: 7
Location: Texas

View user's profile

Send private message

PostPosted: Apr 23, 2018 18:02    Post subject: Re: Biotite?? Not sure what this  

Sorry iPhone is not the clearest


F76F5915-DE8D-4AC6-9547-7653247D873E.jpeg
 Description:
 Viewed:  771 Time(s)

F76F5915-DE8D-4AC6-9547-7653247D873E.jpeg


Back to top
Reply to topic Reply with quote
Like
   

Pete Modreski
Site Admin



Joined: 30 Jul 2007
Posts: 639
Location: Denver, Colorado


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Apr 23, 2018 18:10    Post subject: Re: Biotite?? Not sure what this  

Yes, I think all will agree that this is biotite.
Back to top
Reply to topic Reply with quote
Like
   

James W




Joined: 23 Apr 2018
Posts: 7
Location: Texas

View user's profile

Send private message

PostPosted: Apr 23, 2018 18:14    Post subject: Re: Biotite?? Not sure what this  

Thank you lots! 👍
Back to top
Reply to topic Reply with quote
Like
   
Display posts from previous:   
   Index -> FOR BEGINNERS: What is it? Where is it from?   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 2006-2018


Powered by FMF