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
27 Feb-11:42:17 Re: sometimes fluorescent (Steveb)
27 Feb-10:30:36 Re: sometimes fluorescent (James Catmur)
27 Feb-08:34:24 Re: sometimes fluorescent (Bergur_e_sigurdarson)
27 Feb-08:28:13 Sometimes fluorescent (Tom Mazanec)
26 Feb-23:38:54 Mineral talks live - episode 33 - dr. Federico pezzott; curator; nat hist museum of milan (Bluecapproductions)
26 Feb-23:37:34 Mineral talks live - episode 32 - jeff scovil - mineral photographer; phoenix, arizona, us (Bluecapproductions)
26 Feb-16:47:39 Re: collection of sante celiberti (Sante Celiberti)
26 Feb-14:07:46 Re: collection of michael shaw (Michael Shaw)
26 Feb-14:07:45 The mizunaka collection - beryl (Am Mizunaka)
26 Feb-10:01:34 Re: collection of jean suffert (Jean Suffert)
26 Feb-08:54:26 Re: the mineral collecting history of the 79 mine, gila county, arizona, usa - (33) (Tony L. Potucek)
25 Feb-23:48:45 Re: collection of volkmar stingl (Volkmar Stingl)
25 Feb-18:00:24 Popular minerals - octahedral fluorite from shangbao mine, china (Jordi Fabre)
25 Feb-13:40:55 Mineral talks live - episode 31 - dr. Gene meieran - private collector, oregon, usa (Bluecapproductions)
25 Feb-13:39:13 Mineral talks live - episode 30 - bryan swoboda; founder, bluecap productions hawai'i, usa (Bluecapproductions)
25 Feb-13:35:46 Mineral talks live - apologies!!! i've been lack! (Bluecapproductions)
25 Feb-13:28:25 Re: mineral talks live (Bluecapproductions)
25 Feb-05:10:15 Re: the mineral collecting history of the 79 mine, gila county, arizona, usa - (33) (Jonesey)
24 Feb-20:22:43 The mizunaka collection - smoky quartz (Am Mizunaka)
24 Feb-16:38:41 Re: collection of firmo espinar (Firmo Espinar)
24 Feb-15:07:07 Re: collection of sante celiberti (Sante Celiberti)
24 Feb-11:36:48 Re: collection of sante celiberti (James Catmur)
24 Feb-06:27:14 Re: i want to know this stone (Alshawani)
24 Feb-06:22:02 Re: collection of sante celiberti (Sante Celiberti)
24 Feb-06:18:23 Re: i want to know this stone (Alshawani)

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
79049


The time now is Feb 27, 2021 14:35

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.
Any Idea What This Is?
  
  Index -> FOR BEGINNERS: What is it? Where is it from?
Like


View previous topic :: View next topic  
Author Message

SlowFrog




Joined: 05 Feb 2021
Posts: 5
Location: England

View user's profile

Send private message

PostPosted: Feb 06, 2021 06:10    Post subject: Any Idea What This Is?  

Hi all!

I found this with my metal detecting pinpointer in a park here in the UK. It was just beneath the soil (about an inch down). I couldn't believe the strength of the signal given how tiny it is (maybe 4mm on the longest side). I initially thought it was iron or lead but after closer inspection - I have absolutely no idea!

It's 0.24g, and doesn't react at all to a very strong neodymium magnet. It does however make my pinpointer scream from an inch away! Any ideas?

Cheers,
John



MetalRock.jpg
 Mineral: No idea!
 Dimensions: 4mm
 Description:
 Viewed:  644 Time(s)

MetalRock.jpg


Back to top
Reply to topic Reply with quote
Like
   

SteveB




Joined: 12 Oct 2015
Posts: 158
Location: Canberra

View user's profile

Send private message

PostPosted: Feb 06, 2021 09:33    Post subject: Re: Any Idea What This Is?  

Could be a deformed shot ball from old pistol or rifle. Your metal detector enthusiam means nothing as far as identification. It looks man made, could just be slag. UK has LOTS of war history in the ground even back to the roman times where camps sometimes built smelters to make coins and other items but since you’ve removed and cleaned the item its context for archaeology is now gone forever.
Back to top
Reply to topic Reply with quote
Like
   

Peter Lemkin




Joined: 18 Nov 2016
Posts: 316
Location: Prague

View user's profile

Send private message

PostPosted: Feb 06, 2021 09:58    Post subject: Re: Any Idea What This Is?  

I agree that the best guess [and without more information it can ONLY be a GUESS] is that is is man-made. However, though that puts it almost out of the realm of this forum on minerals, it could possibly be one or a metallic one that was smelted by humans and of some interest. You should do some tests such as hardness, specific gravity [instructions are on this site, I believe in the 'what is this' subforum]. After that, only some chemical tests could likely tell you what it is. It certainly looks metallic. It also looks to my eye to be man-made or human-modified. There may be more of them in the same area unless it is a old bullet, in which case there may only be the one...... If a bullet, it is misshappen from hitting something or time/weathering/chemical changes in the ground, or something other. Why it is so active on your metal detector one can not say. Some metal detectors can be calibrated for different types of metal, others not. Look online to see what metals and alloys your detector is most sensitive to.
Back to top
Reply to topic Reply with quote
Like
   

Poorboy




Joined: 02 Feb 2021
Posts: 1
Location: Reno, NV

View user's profile

Send private message

PostPosted: Feb 06, 2021 13:08    Post subject: Re: Any Idea What This Is?  

Appearances are always tricky, but you should consider "wood tin." I have no idea if cassiterite would set off a metal detector, but it could also be inter-grown with another mineral that is responsible for the signal. Probably man-made, but if it is from the Cornwall area, the odds of wood tin would increase significantly.
Back to top
Reply to topic Reply with quote
Like
   

SlowFrog




Joined: 05 Feb 2021
Posts: 5
Location: England

View user's profile

Send private message

PostPosted: Feb 09, 2021 12:04    Post subject: Re: Any Idea What This Is?  

Thank you for the replies! For the record, I'm not a detectorist and was out in a playing field with my 5 year old son when I found the specimen - I bought him a $20 pinpointer as a toy to 'find treasure' so we were having fun near the surface of the soil, not digging up significant archaeological sites.

Another person recommended I file down the surface a little as he felt it'd be copper. I did so and I believe he was right! The reddish glassy parts might be some other melted substance (paint?!).
Back to top
Reply to topic Reply with quote
Like
   

alfredo
Site Admin



Joined: 30 Jan 2008
Posts: 832


Access to the FMF Gallery title=

View user's profile

Send private message

PostPosted: Feb 10, 2021 00:56    Post subject: Re: Any Idea What This Is?  

"Wood tin" does not react to a metal detector, but good quality large shiny black cassiterite crystals do. (I tried this when I was working in Bolivian tin mines.)
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 2006-2021


Powered by FMF