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
08 Jul-11:45:34 Re: new technology for crystal models (Bob Morgan)
08 Jul-09:47:41 Re: new technology for crystal models (Bob Carnein)
08 Jul-08:32:41 Re: collection of michael shaw (Michael Shaw)
07 Jul-17:55:33 Re: new technology for crystal models (Josele)
07 Jul-17:42:46 Re: collection of sante celiberti - a mineralogical trip through italy (Firmo Espinar)
07 Jul-16:22:42 Re: collection of sante celiberti - a mineralogical trip through italy (Sante Celiberti)
07 Jul-16:19:22 New technology for crystal models (Bob Carnein)
07 Jul-13:51:12 Popular minerals - laurentthomasite (Jordi Fabre)
07 Jul-13:40:22 Re: don lum collection (Don Lum)
07 Jul-11:08:49 Re: collection of volkmar stingl (Volkmar Stingl)
07 Jul-10:55:27 Re: collection of volkmar stingl (Volkmar Stingl)
07 Jul-09:40:41 Re: collection of firmo espinar (Firmo Espinar)
06 Jul-16:03:50 Re: collection of sante celiberti - a mineralogical trip through italy (Sante Celiberti)
06 Jul-14:02:46 Re: tourmaline? ural mountains? (Peter)
06 Jul-08:16:02 Re: tourmaline (Jordi Fabre)
06 Jul-07:30:08 Re: tourmaline (Bob Morgan)
06 Jul-01:05:33 Re: tourmaline (Peter Lemkin)
05 Jul-19:44:20 Re: tourmaline (Josele)
05 Jul-16:14:43 Re: tourmaline (Roger Warin)
05 Jul-16:12:10 Re: tourmaline (Bob Carnein)
05 Jul-16:00:27 Re: collection of sante celiberti - a mineralogical trip through italy (Sante Celiberti)
05 Jul-15:53:10 Re: tourmaline (Bob Morgan)
05 Jul-09:04:13 Re: tourmaline (Josele)
05 Jul-07:34:32 Re: tourmaline (Roger Warin)
05 Jul-06:45:51 Re: tourmaline (Mathias)

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
69954


The time now is Jul 08, 2020 23:31

Search for a textSearch for a text   

A general guide for using the Forum with some rules and tips
Weird rock. Smells STRONG - need help to ID
  
  Index -> What is it? - Where is it from?
Like
1


View previous topic :: View next topic  
Author Message

Volan




Joined: 07 Jan 2020
Posts: 2
Location: Nottingham

View user's profile

Send private message

PostPosted: Jan 08, 2020 05:18    Post subject: Weird rock. Smells STRONG - need help to ID  

Hello everyone!
My name is Andrei and this is my first topic started on this forum, and will definitely won't be the last one :)
I recently went for the first time to Whitby, trying to find some fossils..
I got more rocks than fossils and possible a chunk of fossil wood.

However, I am baffled about one specific BLUE colored rock and I need a second opinion as my knowledge is far from even an amateur level.

So.. here are the details:
Location : Robin Hood Bay (was on shore, and not embedded)
It looks like a soft rock but I tried to cut a small piece with a Dremel tool and it looks quite strong. I tried to polish the surface with a wire wheel (gold color) and the rock is polishing very easy looking like a gold/chrome color.
I tried to split the rock with a chisel and a hammer as it had a crack all the way around. First attempts ended in this rock leaving a groove in the concrete pavement.
And now comes the fun part : after I managed to split the rock a VERY strong smell of sulfur came out (I actually had to leave the rock outside).
I mention that the rock had no smell when hit by the hammer or when I tried to cut and polish. The smell diminished over night but it still stinks.

After all my research I ended up thinking it's some sort of industrial slag. And I hope it is not radioactive :)) or toxic. What do you think ?

Edit : i have some household chemicals based on acid's. One contains Formic Acid (Kilrock - gel) , one Hydrochloric Acid (Harpic x10) , and one Phosphoric Acid (Kilrock descaler) which one should I use for the acid test ?



20200108_095934~2.jpg
 Description:
Top (cut and polished corner)
 Viewed:  5259 Time(s)

20200108_095934~2.jpg



20200108_100009~2.jpg
 Description:
Side
 Viewed:  5261 Time(s)

20200108_100009~2.jpg



20200108_095944~2.jpg
 Description:
Bottom - polish try
 Viewed:  5265 Time(s)

20200108_095944~2.jpg



20200108_100121~2.jpg
 Description:
Polished corner and tool
 Viewed:  5262 Time(s)

20200108_100121~2.jpg



20200108_100031~3.jpg
 Description:
Split along the crack
 Viewed:  5261 Time(s)

20200108_100031~3.jpg


Back to top
Reply to topic Reply with quote
Like
   

Scot Krueger




Joined: 02 Feb 2019
Posts: 11
Location: Massachusetts


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jan 08, 2020 07:21    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

This looks like a small cobble of slightly altered vesicular basalt. It started life as a black lava flow with lots of bubbles. Over time, groundwater allowed the bubbles to become lined with some secondary minerals. The rock was buried enough to be slightly metamorphosed, and the blue color is likely from microscopic clays and/or chlorite. As for the smell, that is impossible to assess from a photo. But I can think of 3 likely possibilities. The first, the white mineral in the holes has sulfur in it, causing the smell when exposed. Second, some of the crud which is on the surface, and obviously invaded deep into the cracks, is some fetid organic matter which you exposed by cracking it open. And third, this might have been exposed to hydrocarbons at some point (petrol from an auto, lighter fluid from a beach fire, natural or manmade oil spill) which seeped into the cracks and was finally exposed to the air when you broke it. Once you have let it air out long enough that it does not smell, it should no longer pose a health hazard.
Back to top
Reply to topic Reply with quote
Like
   

Tracy




Joined: 15 Sep 2006
Posts: 550
Location: Toronto


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jan 08, 2020 09:22    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

Scot Krueger wrote:
Once you have let it air out long enough that it does not smell, it should no longer pose a health hazard.


...what type of health hazard currently exists?

_________________
"Wisdom begins in wonder" - Socrates
Back to top
Reply to topic Reply with quote
Like
   

stoned




Joined: 01 Jan 2020
Posts: 17
Location: Atlanta

View user's profile

Send private message

PostPosted: Jan 08, 2020 11:43    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

I wouldn't handle it without a HazMat suit...
Back to top
Reply to topic Reply with quote
Like
1
   

Tracy




Joined: 15 Sep 2006
Posts: 550
Location: Toronto


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jan 08, 2020 12:36    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

stoned wrote:
I wouldn't handle it without a HazMat suit...


I can't tell whether you are serious or joking. I sincerely hope the latter. Again, where's the health hazard? It's a cobble that stinks like sulfur.

_________________
"Wisdom begins in wonder" - Socrates
Back to top
Reply to topic Reply with quote
Like
   

Pete Modreski
Site Admin



Joined: 30 Jul 2007
Posts: 684
Location: Denver, Colorado


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jan 08, 2020 14:01    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

He was joking about the hazmat suit, Tracy.

Andrei, though the rocks looks just like a vesicular basalt, it might also be some type of industrial slag, containing sulfur, or iron sulfides that have oxidized to produce the sulfur smell. Such slag often contains gas bubbles, and can contain sulfur compounds.

Pete
Back to top
Reply to topic Reply with quote
Like
   

alfredo
Site Admin



Joined: 30 Jan 2008
Posts: 790


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jan 08, 2020 14:02    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

I fully agree with Tracy. Sulphur (or more accurately sulphur oxides or hydrogen sulphide rather than elemental sulphur itself) has a very strong smell, so it takes only a tiny amount in a rock to notice it. No danger to you, your pets, your kids... But don‘t store it next to your silverware because sulfur makes silver tarnish.
Back to top
Reply to topic Reply with quote
Like
   

Tracy




Joined: 15 Sep 2006
Posts: 550
Location: Toronto


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jan 08, 2020 15:21    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

Thank you Pete and thank you Alfredo, and apologies to Stoned for sounding snitty. Text is often emotionless and I missed the joke.

I think for the new year/decade it's time for me to climb down off my soapbox and leave the focus of this forum on minerals (where it belongs), not health and safety. I would rather people were overly cautious than the opposite, even if I don't always understand the (in my opinion) misperception that there is any meaningful health hazard potential associated with handling specimens (radioactivity and dust-generating activities like extracting and trimming or cutting excepted). Don't eat, snort, or rub on skin - to each their own after that.

A happy 2020 to everyone!
Tracy

_________________
"Wisdom begins in wonder" - Socrates
Back to top
Reply to topic Reply with quote
Like
   

Volan




Joined: 07 Jan 2020
Posts: 2
Location: Nottingham

View user's profile

Send private message

PostPosted: Jan 08, 2020 16:17    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

Thank you for your answers ! Great help ! I will keep it aside for the moment and try to "explore" it more.
I also have couple of rocks from the same place and some resemble like coprolite fossil, plus other unknown (to me) rocks.
I will post a photo when i can make some clear ones.

Cheers!
Back to top
Reply to topic Reply with quote
Like
   

colin robinson




Joined: 29 May 2013
Posts: 78
Location: Cumbria


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jan 08, 2020 17:16    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

Industrial slag. Millions of tons of it ended up in the north sea after being dumped from the iron and steel works on Teesside. Longshore drifting has carried it south and it can be found all along the Yorkshire coast and probably much further afield.
Back to top
Reply to topic Reply with quote
Like
   

stoned




Joined: 01 Jan 2020
Posts: 17
Location: Atlanta

View user's profile

Send private message

PostPosted: Jan 09, 2020 16:41    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

"and apologies to Stoned for sounding snitty. Text is often emotionless and I missed the joke. "

No apologizes needed Tracy, I don't think you were snitty at all. I was in a hurry when I left that, I should have put a smiley face at the end... :-)

Speaking of health and safety...

since I know I may have a stone or two that has been irradiated by man (thinking of my smoky quartz), I wonder if I had a Geiger counter, how much residual is left over? Anything for me to worry about?

It wouldn't be allowed to be sold here I would think if it was radio active.
Back to top
Reply to topic Reply with quote
Like
   

Jordi Fabre
Overall coordinator of the Forum



Joined: 07 Aug 2006
Posts: 4555
Location: Barcelona


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jan 09, 2020 17:53    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

stoned wrote:
..It wouldn't be allowed to be sold here I would think if it was radio active.

In no case it would be allowed, this is a non-commercial Forum.
Back to top
Reply to topic Reply with quote
Like
   

stoned




Joined: 01 Jan 2020
Posts: 17
Location: Atlanta

View user's profile

Send private message

PostPosted: Jan 09, 2020 18:49    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

What I meant was by saying "here".... as in the USA.
Back to top
Reply to topic Reply with quote
Like
   

Tracy




Joined: 15 Sep 2006
Posts: 550
Location: Toronto


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Jan 10, 2020 08:45    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

"Irradiation" means receipt of energy from radioactive emissions/decay. The radioactivity is inherent to the material emitting the energy, it doesn't transfer to the irradiated object. If it did, you would become radioactive after getting an x-ray. :)

Your smoky quartz (which might have been naturally irradiated by the sun) is nothing to worry about.

Cheers
Tracy

_________________
"Wisdom begins in wonder" - Socrates
Back to top
Reply to topic Reply with quote
Like
   

stoned




Joined: 01 Jan 2020
Posts: 17
Location: Atlanta

View user's profile

Send private message

PostPosted: Jan 11, 2020 17:43    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

Good to know Tracy, was worried I would start to glow if I kept it too close for too long. Thanks for putting my mind at ease. I learn a lot here, that's for sure!
Back to top
Reply to topic Reply with quote
Like
   

cascaillou




Joined: 27 Nov 2011
Posts: 236

View user's profile

Send private message

PostPosted: Jan 14, 2020 19:48    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

Tracy wrote:
"Irradiation" means receipt of energy from radioactive emissions/decay. The radioactivity is inherent to the material emitting the energy, it doesn't transfer to the irradiated object.


Actually, irradiation treatment can make a stone radioactive, but that is a matter of the type of particle used for irradiation, and of the duration of irradiation (in which case a cooling period is required after the treatment before the stone is put on the market). Treatment by gamma irradiation (such as cobalt treatment, which is the most commonly used method nowadays), doesn't make stones radioactive.
Back to top
Reply to topic Reply with quote
Like
   

stoned




Joined: 01 Jan 2020
Posts: 17
Location: Atlanta

View user's profile

Send private message

PostPosted: Jan 14, 2020 22:34    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

Oh great..... :-(

Lets hope it was gamma irradiation (if it was irradiated), and it's already "cooled down"...
Wonder if there is a test I can run without a Geiger counter?
Back to top
Reply to topic Reply with quote
Like
   

cascaillou




Joined: 27 Nov 2011
Posts: 236

View user's profile

Send private message

PostPosted: Jan 15, 2020 04:50    Post subject: Re: Weird rock. Smells STRONG - need help to ID  

My answer was rather addressing Tracy's statement.

You don't need to worry about your smoky quartz.
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 2006-2020


Powered by FMF