Science question

I know I should ask my daughter this but why do gold and aluminum share the same conductivity, the metals properties are so far apart, and what other metals that we dig have the same conductivity, thanks

Copper and Silver are very close

my guess would be the boxite mineral used to make alum.

Depends on what gold alloy and what aluminum alloy you're comparing.
These threads may help answer your questions:
[www.dankowskidetectors.com]
[www.metaldetectingforum.co.uk]

Great thread recommendations Pimento. I remember the Tom's thread and the U.K. was a new for me, excellent read.