Same here, we use to roll it around in the palm of our hands.
Are there any uses for it other than mining gold?
I did the same. I collected mercury and PCB oil from old transformers. I used both for all kinds of things, got it all over me at times, didn't have any idea that both could kill you from 5 miles away just by looking in that direction.
I vividly remember the time they tore up 50km of the TransCanada cuz a transport truck carrying old transformers leaked a bit of oil on the highway. A few folks following the truck became millionaires overnight.
The truth about PCBs never did see the light of day. It wasn't PCBs in rice that killed those folks in Japan after all, the medical studies showed it was actually another substance also in the rice. But the damage was done and no government in the world would admit the error. The documentation was buried and to this day, PCBs are blamed and they are still banned. Another international government cover up.
Mercury is a whole nuther matter.
Inorganic mercury such as bound in rocks is not all that dangerous. Yes it can be leached after hydro dams go in, but the danger is mainly from low levels of mercury in newly formed lakes being bioamplified over time in generations of fish and subsequently eaten by humans. Ocean tuna is also a recognized exposure risk for humans and should be enjoyed only once a week- less if at all in a pregnant woman.
Much more concerning is any form of organic mercury, one of which is so toxic that one drop on skin is lethal. And inhalation of vapours or oral exposure can form organic mercury compounds given extended time of exposure. So a Professor in an electro chemical department isn’t the one who has the necessary expertise to comment. You really need a clinical chemist, or better yet a toxicologist.
Mercury does slowly release a vapor which is absorbed and accumulates in your body. Clean up after a spill even of an old thermometer is wise. Unfortunately there isn’t a reliable test of mercury level in a human and effects take awhile to occur. Suggest looking up Minamata disease if you really want to scare yourself. Nerve and brain damage is mo joke.
In toxicology the dose is key. Drinking enough tap water can kill, C02 can easily be fatal, and yes, mercury in the wrong form or dose is dangerous as hell.
Agreed with one caveat. People don't get to talk to toxicologists in any format that conveys reason or facts. Instead, the average person listens to politicians, the media, and radicals who always seem to prey on the natural human fear response. I'd prefer to talk to any professor in the sciences than the sources readily available to us. A great read is a book called "Risk - The science and politics of fear" by Dan Gardener. We are evolved to be afraid. Most often unreasonably and irrationally afraid. The media and government love to use our fear to control us.
But yes, I tend to avoid organic mercury too. I like tuna but I only eat it once a month at best. Same goes for other large predatory fish. So point very well taken.
Still, I'd love some liquid mercury to play with and I'd be first in line for some PCB oil from an old transformer.