Hello,
so i just got a pair of these curious rocks which some describe as 'electromagnetically charged' in online blurb. They do exhibit repulsion, very slight, when brought close on their long sides. I can then flip one stone around and still get repulsion, not attraction.
I've tested them down to the minimum i can read - 10uT - on my flux density meter, but no reading is evident. I've probed them for resistance. They are conductive and exhibit variable resistance in the kilo to megaohm range depending on the probe position.
But what is causing the repulsion? Are they somehow permanently electrically charged somewhere within such that the charge cannot dissipate?
It's a mystery i tell you.