Detectable rocks?

[Ronstar]

I’m with family on the Oregon coast for a week, of course I brought the detector!!! This is maiden voyage for the F75 so playing and experimenting a lot. Managed to recover some clad coins, a live ammo round that appears to be 357 case length but the bullet is a short round nose and solid metal, and a rock that made both the detector and the handheld sound off. No other rocks in the area that did the same thing, I’ve never had this happen before, thoughts?
Detector reading would indicate a copper penny in normal hunting conditions.

 

[okierebel]

Ronstar I'm not up on my ores but surely it's some kind of ore in it. Not much help.
HH okie

 

[tvr]

Metal ores, slag from foundries, meteors ... not sure what you have, but yes hot rocks are around. There is one ball field parking lot near me that has slag for the gravel and it is very tough to squeak out the dropped coins ... but about 5 years ago I did manage a big silver ring from that area.
Where does the rock discriminate out ... if it does?

 

[Ronstar]

I did not try that or even think about doing that. I will try that tomorrow. I dont think this is slag, it looks like every other smooth rock you see around here.

 

[Missouri -- Ma Betty]

I did not try that or even think about doing that. I will try that tomorrow. I dont think this is slag, it looks like every other smooth rock you see around here.

Could it be a meteorite, as its shape & being black (burned passing thru space) looks like it could be! Hey--maybe you found a patch from a few of them splitting apart?? --would be unlikely but ya never know--A rock collecting specialist probably can tell you what it is! Good luck--a nice find anyway to start a rock collection or to add to one! Ma

 

[TerryEastTexas]

I have found 4 hot rocks in my area over the years. One was even magnetic. I don't know a lot about them but they are out there and will fool a detector.

 

[Missouri -- Ma Betty]

I have found 4 hot rocks in my area over the years. One was even magnetic. I don't know a lot about them but they are out there and will fool a detector.

I believe Meteorites are magnetic & worth a lot of money when real & selling them! Those hunting them in the South & West use their detectors with magnets attached to them! Ma

 

[Ronstar]

Had a chance to try and cleanup the head-stamp area on the cartridge casing. Its dinged up a bit and face area is pitted some but the primer is intact and I can make out F C on top and equally spaced on the bottom 5 8. My understanding is this would be Federal Cartridge made in 1958 as a civilian contractor for government order? Im 99% sure this is a 357 round, anybody know if they used 357 in the military or could this be like an FBI round??

 

[407floyd]

The most common questions to answer on meteorites is: Is it heavy for its size? Will a magnet attract it? Most have high iron content, but a small percentage are rocky. Common magnetite will make a compass move, but is terrestrial.

 

[Ronstar]

Currently on vacation on OR coast, no magnet. Does seem heavy for its size. Now curiosity is high enough to go buy a magnet of some sort. Put on ground this morning and ran discrimination up until quiet, right at the last iron signal.

 

[Missouri -- Ma Betty]

Currently on vacation on OR coast, no magnet. Does seem heavy for its size. Now curiosity is high enough to go buy a magnet of some sort. Put on ground this morning and ran discrimination up until quiet, right at the last iron signal.

If you research Meteorites it tells you how to test it (complicated for me) before sending it in to a lab! But if it is truly one--good money payoff for selling depending on size! Ma