Goold Posted September 13, 2019 Share Posted September 13, 2019 I apologize to all my weak English A few days ago I was on a journey to look for a gpz 700 golden device when I came across a large quartz rock I passed the device on the rock and issued the device indicating a clear target and the device was as follows General Allergy 9 I switched the settings to make sure the target was metal and not an imaginary target Difficult Allergy 2 . It also gave me a clear target signal. I broke the rock into parts and it took me a great effort. I reached the desired part and the crystal was in the heart of the rock Suddenly after I took out the desired part, I broke the piece in half and found that this material resembles mud and strange when I passed the device on the piece after I broke it the target signal disappeared and the device did not make any sound I tried to change the settings but to no avail the device kept silent A question. Do any of you know these crystalline materials And what is your interpretation of what happened Thanks to all Link to comment Share on other sites More sharing options...
Lacky Posted September 13, 2019 Share Posted September 13, 2019 I don't, but I hope you get an answer because I have a sample that looks just like it I found a couple weeks ago. Has a target id of 12 on the equinox. It was a flat black when I first cracked it open so it is oxidizing. Mine also started out as a fist sized chunk of solid quartz. Link to comment Share on other sites More sharing options...
noob Posted September 20, 2019 Share Posted September 20, 2019 I believe it might be Cobalt. Cobalt is invisible to pulse induction metal detectors Link to comment Share on other sites More sharing options...
Lacky Posted September 20, 2019 Share Posted September 20, 2019 4 hours ago, phrunt said: Wouldn't Cobalt be magnetic? Have you tried to put a magnet to it? Yes, it's magnetic, just checked. Sigh, fine, I'll stop procrastinating and get a magnet to put on my pick 😒 Link to comment Share on other sites More sharing options...
noob Posted September 21, 2019 Share Posted September 21, 2019 21 hours ago, phrunt said: Wouldn't Cobalt be magnetic? Have you tried to put a magnet to it? Cobalt is used in the making of magnets. But for some reason pulse induction metal detectors cannot pick it up 1 Link to comment Share on other sites More sharing options...
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