Is it a rock or a piece of scrap?

Dougie Webb

Sr. Member
Jun 14, 2019
393
642
Stone Mountain, Georgia
Detector(s) used
Fisher F5
Garrett Ace 200
Primary Interest:
Metal Detecting
Seems this is a question that perplexes me a lot.

This little piece is about an inch by an inch, it registered a strong and consistent 63-67 on the Ace 200. I've never found anything in that range that wasn't a ketchup or Swisher Sweets package. It's heavy (specific gravity is ~5.5) and it's almost completely flat. Completely non-magnetic. It sounds kinda like a quarter when you drop it on the counter. Leaves a gray streak - both the exposed metal and the "coating." Found near Atlanta about three inches deep in a public park. Nothing else within a couple of feet of it.

I was sure it was a rock of some kind, but nothing made sense, so I decided to do some sanding on the edges. It revealed the shiny metal you see, which made me start thinking "scrap junk" with oxidation. BUT, it's def not iron, so oxidation doesn't really make sense.

If anyone has a wild guess, I'd appreciate any and all efforts. Thanks!

Sanded it to reveal the exposed metal
IMG_2208 (1).jpg

IMG_2209.jpg

A close-up of the surface taken with my cheap digital microscope. This looks strangely like a map of North America and Europe.
IMG_2210.jpg
 

GoldieLocks

Bronze Member
Dec 28, 2019
1,075
1,119
Nevada
Primary Interest:
All Treasure Hunting
Pyrite with soldering of melted aluminum on the side? Map, you are not kidding us buddy.
 
Upvote 0

pepperj

Gold Member
Feb 3, 2009
28,441
94,543
Detector(s) used
Deus, Deus 2, Minelab 3030, E-Trac,
Primary Interest:
Relic Hunting
3 scrap metals off the top.
Aluminum
Magnesium-squirt of vinegar-it will foam
zinc
 
Upvote 0

bfloyd4445

Sr. Member
May 18, 2015
257
189
Sacramento Ca. or Drain Or. USA
Detector(s) used
Garrett AT Gold
Primary Interest:
Other
Have you checked to see if it is radioactive? It reminds me of what i have seen in the Nevada desert. uranium is like 50 times denser than lead and can be found any place. Looks will vary depending upon the host rock.
Try a black light on it. It may very well be pitchblend
 
Upvote 0

Kray Gelder

Gold Member
Feb 24, 2017
6,612
11,879
Georgetown, SC
Detector(s) used
Fisher F75
Primary Interest:
Metal Detecting
Have you checked to see if it is radioactive? It reminds me of what i have seen in the Nevada desert. uranium is like 50 times denser than lead and can be found any place. Looks will vary depending upon the host rock.
Try a black light on it. It may very well be pitchblend

Correct me if I'm wrong, but Uranium is not found in metallic form in nature. It is recovered as an oxide, and rich deposits will only have about 20 % Uranium oxide.
 
Upvote 0

bfloyd4445

Sr. Member
May 18, 2015
257
189
Sacramento Ca. or Drain Or. USA
Detector(s) used
Garrett AT Gold
Primary Interest:
Other
Correct me if I'm wrong, but Uranium is not found in metallic form in nature. It is recovered as an oxide, and rich deposits will only have about 20 % Uranium oxide.

not sure but it is often found with lead and can be heavy. And it usually isnt very radioactive in natural state. Back in the sixties i got a chance to go prospecting with a couple of guys, one i worked for part time and the other his hired geologist to investigate the area of my bosses mine in the mountains east of the humbolt river and there was talk of uranium in the area. The pix that started this thread looked like a couple of the samples taken on that trip. Was common back then to locate and filing claims on deposits. ....chuckle... don't think anyone made any money off the effort. Was beautiful country. Ed mine was for some kind of mineral used in smelting some kind of ore. So long ado
 
Upvote 0
OP
Dougie Webb

Dougie Webb

Sr. Member
Jun 14, 2019
393
642
Stone Mountain, Georgia
Detector(s) used
Fisher F5
Garrett Ace 200
Primary Interest:
Metal Detecting
  • Thread Starter
  • Thread starter
  • #7
Guys, at the advice of some folks on the Rock Hounds facebook group, I decided to throw it in a pot and see if I could get things to separate. There were several in the group who were convinced the rock had gold in it, which wasn't even on my radar. As it began to melt, things sure enough separated, and I saw a distinctive golden-colored blob floating. I couldn't get it out before it dispersed, but after putting the cooled metals under a cheap microscope, I found several small flecks that appear pretty convincing.

What do you guys think?

A screenshot from my microscope
IMG_2262.jpg

And a gold vs pyrite comparison pic I pulled from google
IMG_2271.JPG
 
Upvote 0

Top Member Reactions

Users who are viewing this thread

Top