Electricity from small rock

[ibpointless2]

yeah i have noticed that it change polarity.
if its water battery how it gives power when rock is dry?
tnx for the video, il check it out in the morning.

My first thought was water battery but never confired that it was. Dry or wet it would give me voltage. Some spots was little or no voltage while others were crazy high voltage, I think i got up to .5 volts one time.

I think it might have to do with the quartz in the rocks. Or it could be something to do with the stress the rocks have come across that gives them the voltage. Piezo speakers have a quarts rock in them that can produce power. I wish i could tell you more but even to this day it has stumped me. 

[hemancro]

i took your advice and connected wire (i think its zinc) to 1 side of the rock.
guess what? i got 1 peak with 0.680 volt, !
il post video on youtube soon.
i dont know what it is but its interesting.
il continue to experiment.

[hemancro]

i want to add something.
i made concrete battery, how i call it, 20.5.2010.
at first it give 1.2 volts and 6-7 miliampers.
now give 0.8 volts and 1 miliamper.
strange thing is that after 2 months it fall down to 0.8V and 1 miliamper.
at first it was pure galvanic reaction but... after a while it stuck on 0.8 volts and even today give the same.
and can still run joue thief and light red LED.
i think it have something with minerals in sand.

[hemancro]

here is new video. i dont have aluminium foil, il go and buy if i can
http://www.youtube.com/watch?v=7Hw7R-Sc8tM

[hemancro]

i left 6 rocks and 6 capacitors 22 uF 16V for around 5 hours in series.
they charge capacitors to more than 400 millivolt.
as soon as i connect voltmeter volts rapidly dropped to 20 millivolt.

now i know that they:
charge capacitors.
mv can go from 1 to 200.
mv can get higher (700 mv) with wire or some metal connected to rock from 1 side.
change polarity.
can link in series to gain voltage

if anyone have more information and willing to share, il be very happy