got mine in 1 pound bottles (plastic) from a company building neon signs, yes old gold prospectors used it to bind gold, many chewed the ball like gum, lots died shortly after. they boiled the mercury off to leave a nugget in the pan, those fumes are deadly
Here's how it's done in a typical illegal, unpermitted artisanal mining operation.
You dig your shaft ignoring all safety and environmental regulations and laws.
You send small men, women and children underground with illegally purchased explosives and zero training and ventilation and after a while they bring this back to surface.
You put the ore into homemade ball mills and grind the ore with steel balls and sometimes illegally purchased sodium cyanide or illegally purchased mercury.
Once the ore is ground to the proper size you pan the slurry down to the heavies, illegally discharging the waste and cyanide and mercury into the local creek and then clean it up by adding more mercury which "amalgamates" with the gold and silver.
You take the amalgam and put it into whatever criminally unsuitable setup that you have made to roast off the mercury. You do not control or catch the mercury vapor in a retort for re-use but instead allow its vapours to drift away so that your children can breath it and it contaminates all the local soil in the area where you probably live.
You do not wear any PPE like a respirator, safety goggles, lab coat, gloves or shoes but you can afford booze, crystal meth, hookers and dozens of kids.
After you have roasted off the mercury you are left with dore (gold and silver) in the fusion pan.
You ignore all of the efforts by the professional miners to educate you and to desist from this dangerous and illegal activity.