Everything is a conductor is some amount
yes
If I am not wrong, rock is not a heat conductor.
conductor
a rock ?
no
Insulator
A rock would be a fair to moderate conductor of heat. A rock would typically not conduct electricity, unless of course the rock in question is a piece of high quality ore.
Like most rock, it is an insulator.
Probably. It depends on the crystal structure of the dominant mineral. A pourous rock, such as honeycomb rock in Jamaica, will not be a good conductor of sound. A dense rock, like granite, will conduct sound better.
An insulator is a poor conductor of energy. For example; Rubber is a poor conductor of electricity Rock is a poor conductor of heat A sponge is a poor conductor of sound.
there is big variety of stones on this planet ! which kind of stone ?
It's made of steel with a coating of nickel, so it is a conductor but not as good as the old coins with copper in.
Brass is a metal that conducts electricity. Therefore, a brass paper clip is a conductor.