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
23 Jun-17:28:53 Re: collection of michael shaw (Crosstimber)
23 Jun-16:11:20 The mizunaka collection - quartz (Am Mizunaka)
23 Jun-14:55:20 Re: collection of michael shaw (Don Lum)
23 Jun-14:02:34 Re: new generation for picture - ploum (Ploum)
23 Jun-11:30:23 Re: collection of michael shaw (Crosstimber)
23 Jun-08:59:08 Re: collecting quartz on the little falls dolostone (Vic Rzonca)
23 Jun-06:26:55 Re: franjungle collection (Firmo Espinar)
23 Jun-01:19:20 Re: new generation for picture - ploum (Ploum)
22 Jun-14:09:13 Sainte-marie-aux-mines 2019 - it's already here (Jordi Fabre)
21 Jun-17:26:16 Re: amethyst and...? (Linus)
21 Jun-15:29:17 Re: collection of annemieke en rob schnerr (Rob Schnerr)
21 Jun-14:23:22 Re: don lum collection (Don Lum)
21 Jun-12:30:25 Re: collection of annemieke en rob schnerr (Rob Schnerr)
21 Jun-02:09:18 The mizunaka collection - quartz (Am Mizunaka)
21 Jun-01:35:49 Re: collection of annemieke en rob schnerr (Tobi)
20 Jun-18:28:18 Re: locality question regarding moroccan calcite (Tar4ntula)
20 Jun-11:18:33 Re: amethyst and...? (Mathias)
20 Jun-07:01:55 Re: collection of annemieke en rob schnerr (Rob Schnerr)
20 Jun-04:30:00 Re: a potpourri of musings....barely related to minerals. (Alfredo)
19 Jun-20:48:46 Re: fake ruby? (John Betts)
19 Jun-20:20:29 Re: cleaning nifontovite (Linus)
19 Jun-20:00:35 Re: cleaning nifontovite (Peter Megaw)
19 Jun-16:17:25 Amethyst and...? (Linus)
19 Jun-09:17:29 Re: collection of annemieke en rob schnerr (Rob Schnerr)
19 Jun-08:52:18 Re: fake ruby? (Bob Carnein)

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
56070


The time now is Jun 24, 2019 16:29

Search for a textSearch for a text   

A general guide for using the Forum with some rules and tips
Help identifying this rock
  
  Index -> What is it? - Where is it from?
Like
2


View previous topic :: View next topic  
Author Message

James Anderson




Joined: 26 Oct 2018
Posts: 7
Location: Florida

View user's profile

Send private message

PostPosted: Oct 26, 2018 19:57    Post subject: Help identifying this rock  

This rock was given to me by my niece from her stay in Virginia, USA. I usually am pretty savvy when it comes to identifying rocks, gemstones, minerals etc, but this one has me stumped. I have not been able to find anything that even remotely resembles this rock. As you can see in the pictures the rock has a very definite blue color to it with a swirled lighter blue color almost creating a marble of darker and lighter blue colors. Interesting also is the fact of the Stone has some spots that appear to have some sort of burnt or charred organic matter. The story gets even better though, to my complete and total accidental discovery this rock has magnetic properties as as I found magnets do cling to it. Any help identifying this rock would be much appreciated!!


20181026_201220.jpg
 Description:
 Viewed:  1527 Time(s)

20181026_201220.jpg


Back to top
Reply to topic Reply with quote
Like
   

James Anderson




Joined: 26 Oct 2018
Posts: 7
Location: Florida

View user's profile

Send private message

PostPosted: Oct 26, 2018 20:01    Post subject: Re: Help identifying this rock  

Pic 2


20181026_201027.jpg
 Description:
 Viewed:  1525 Time(s)

20181026_201027.jpg


Back to top
Reply to topic Reply with quote
Like
   

James Anderson




Joined: 26 Oct 2018
Posts: 7
Location: Florida

View user's profile

Send private message

PostPosted: Oct 26, 2018 20:02    Post subject: Re: Help identifying this rock  

Pic 3


20181026_201010.jpg
 Description:
 Viewed:  1528 Time(s)

20181026_201010.jpg


Back to top
Reply to topic Reply with quote
Like
   

James Anderson




Joined: 26 Oct 2018
Posts: 7
Location: Florida

View user's profile

Send private message

PostPosted: Oct 26, 2018 20:03    Post subject: Re: Help identifying this rock  

Pic 4


20181026_201109.jpg
 Description:
 Viewed:  1525 Time(s)

20181026_201109.jpg


Back to top
Reply to topic Reply with quote
Like
   

James Anderson




Joined: 26 Oct 2018
Posts: 7
Location: Florida

View user's profile

Send private message

PostPosted: Oct 26, 2018 20:05    Post subject: Re: Help identifying this rock  

Pic 5


20181026_201140.jpg
 Description:
 Viewed:  1527 Time(s)

20181026_201140.jpg


Back to top
Reply to topic Reply with quote
Like
   

James Anderson




Joined: 26 Oct 2018
Posts: 7
Location: Florida

View user's profile

Send private message

PostPosted: Oct 26, 2018 20:06    Post subject: Re: Help identifying this rock  

Pic 6


20181026_201315.jpg
 Description:
 Viewed:  1526 Time(s)

20181026_201315.jpg


Back to top
Reply to topic Reply with quote
Like
   

Bob Harman




Joined: 06 Nov 2015
Posts: 544
Location: Indiana


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Oct 26, 2018 20:54    Post subject: Re: Help identifying this rock  

If from Virginia, probably excess blue ceramic glass from a glass works poured out and onto nearby rock forming a type of glass slag. I do not think that it is a polished natural microcrystalline blue chalcedony type quartz. Whatever it is, nice find. Perhaps the rock is weakly magnetic, but of that, I am skeptical.
BOB
Back to top
Reply to topic Reply with quote
Like
1
   

James Anderson




Joined: 26 Oct 2018
Posts: 7
Location: Florida

View user's profile

Send private message

PostPosted: Oct 26, 2018 21:27    Post subject: Re: Help identifying this rock  

Definitely is magnetic. Magnets definitely sticks to this rock.
Back to top
Reply to topic Reply with quote
Like
   

Firmo Espinar
Site Admin



Joined: 05 Apr 2017
Posts: 347
Location: Medellín, Colombia.


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Oct 26, 2018 22:10    Post subject: Re: Help identifying this rock  

Hi James.

Welcome to FMF.

Please read the following link to avoid overloading the users posts box:

How to add multiple photos to a Post

You also find more tips here:

A general guide for using the Forum with some rules and tips


Regards.
Back to top
Reply to topic Reply with quote
Like
   

Volkmar Stingl




Joined: 23 Sep 2012
Posts: 92
Location: Innsbruck

View user's profile

Send private message

PostPosted: Oct 27, 2018 02:45    Post subject: Re: Help identifying this rock  

Definitely glass slag.
Back to top
Reply to topic Reply with quote
Like
   

Bob Harman




Joined: 06 Nov 2015
Posts: 544
Location: Indiana


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Oct 27, 2018 04:31    Post subject: Re: Help identifying this rock  

VOLKMAR, Thanks for agreeing with me on this.

JAMES A, "Definitely magnetic.....a magnet sticks to the rock". Well JAMES, I believe that you have this wrong.

If your rock contains some iron, yes the magnet will stick to it, but it is the magnet that is magnetic and not the rock.

On the other hand if your rock was composed of the mineral magnetite it would attract such non-magnetic objects such as a small iron nail or small iron paperclip. Then your rock would be magnetic. So put a small iron nail or paperclip on a smooth table top and see if these objects can be moved by the rock or jump up and attach to the underside of the rock. If done carefully, and that occurs, only then would your rock be magnetic.

Iron objects like iron containing rocks, nails, paperclips, etc are not, by themselves, magnetic. They need to be brought into a magnetic field to show the property of magnetism. The magnet and the mineral magnetite have this property of a magnetic field to help show the property of magnetism.
James, it might help if you reviewed these basic principles of magnetism.

BOB
Back to top
Reply to topic Reply with quote
Like
   

R Saunders




Joined: 28 Jul 2018
Posts: 49
Location: Michigan


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Oct 27, 2018 05:53    Post subject: Re: Help identifying this rock  

Did she find it or buy it? Look up Michigan Leland Blue Stone. a slag that was dumped and people are turning it into jewelry. Circa 1900. Just a possible.
Back to top
Reply to topic Reply with quote
Like
   
Display posts from previous:   
   Index -> 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 2006-2019


Powered by FMF