🔎 UNIDENTIFIED Help identifying rock

67GTA

Sr. Member
Dec 3, 2017
252
316
Franklin, KY
Detector(s) used
Equinox 800 XP Deus 2 Vanquish 540
Primary Interest:
Metal Detecting
Found this while detecting in south central Kentucky. VDI is 25-30 on Deus and 1-2 on the Equinox. That is generally gold range. There isn't any glacial gold in this area. It is very light and porous kind of like pumice. If you turn it just right it has a silvery glint. Any ideas? 20220328_110741.jpg 20220328_110747.jpg
 

traveller777

Gold Member
Aug 20, 2017
5,435
17,432
East Tennessee
Detector(s) used
Minelab CTX 3030 & Explorer
Primary Interest:
All Treasure Hunting
Found this while detecting in south central Kentucky. VDI is 25-30 on Deus and 1-2 on the Equinox. That is generally gold range. There isn't any glacial gold in this area. It is very light and porous kind of like pumice. If you turn it just right it has a silvery glint. Any ideas? View attachment 2017868 View attachment 2017867
Somebody much more knowledgeable than me likely will help, but time it looks like Slag. Was there a smelting operation of some sort around?

Thanks for sharing find.
 

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67GTA

67GTA

Sr. Member
Dec 3, 2017
252
316
Franklin, KY
Detector(s) used
Equinox 800 XP Deus 2 Vanquish 540
Primary Interest:
Metal Detecting
It is very similar to scoria or basalt, but the vesicles are tiny. Reminds me of the pumice type rocks in gas fireplaces/grills. It's possible it was from the old homesite. It was lived in until the 70's before it was torn down. I've read that extruded type rocks can contain magnesium. Would that be a low conductor on a metal detector? Don't have any magnesium to test.
 

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money mike

Greenie
May 20, 2018
14
37
clarksville,indiana
Detector(s) used
minelab equinox 800, garrett at pro, max, 350
Primary Interest:
Metal Detecting
Found this while detecting in south central Kentucky. VDI is 25-30 on Deus and 1-2 on the Equinox. That is generally gold range. There isn't any glacial gold in this area. It is very light and porous kind of like pumice. If you turn it just right it has a silvery glint. Any ideas? View attachment 2017868 View attachment 2017867
im in Kentucky as well and Ive uneathed a light weight black stone with shiny silvery sparklkes too. Im not sure what it is but I bet there is alot in Kentucky
 

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Kray Gelder

Gold Member
Feb 24, 2017
7,013
12,577
Georgetown, SC
Detector(s) used
Fisher F75
Primary Interest:
Metal Detecting
No surface volcanic deposits in Kentucky. There are intrusive dikes, but they wouldn't produce a rock like that. What Kentucky does have is coal, and coal power plants. I think maybe a coal clinker, which will be found by detectors, with varying VDI numbers.
 

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