To: TobagoJack who wrote (94790 ) 9/20/2012 1:05:18 PM From: average joe 1 Recommendation Read Replies (1) | Respond to of 217593 HOW TO USE MERCURY SAFELY Mercury, also known as quicksilver or hydrargyrum, is a chemical element with the symbol Hg (Latinized Greek: hydrargyrum, from "hydr-" meaning watery or runny and "argyros" meaning silver) and atomic number 80. Mercury is the only metal that is liquid at standard conditions for temperature and pressure; the only other element that is liquid under these conditions is bromine. With a melting point of -38.83 °C and boiling point of 356.73 °C, mercury has one of the broadest ranges of its liquid state of any metal. A heavy, silvery d-block metal, mercury is also one of the five metallic chemical elements that are liquid at or near room temperature and pressure, the others being caesium, francium, gallium, and rubidium. If you want to use mercury to recover your fine gold, place a little in a batch of wet (or dry) black sand mixture and let it roll around until all the fine gold is taken up and the mercury looks fat and floppy. Place this blob into a small piece of chamois (even a handkerchief will do), gather all the edges and twist until the mercury ooze through the pores (or the threads) and leaves a button of silver-coloured amalgamated gold. Using an old “throw away pan,” heat the button slowly over an outside fire. The mercury will evaporate and leave the gold free. Let cool a bit, the slowly add vinegar to cover. Let cool a bit, then slowly add vinegar to cover. Bring to a boil for 3-4 minutes, pour off vinegar and wash with soapy water. CARE MUST BE TAKEN! DO IT OUTSIDE! DO NOT MELT THE GOLD! DO NO USE THE PAN FOR ANYTHING ELSE! DO NOT BREATHE THE FUMES! MERCURY FUMES ARE DEADLY POISONOUS! Old-timers used potatoes. They sliced the potato in half, scooped out a hollow center big enough to build hold the amalgamated gold, then tied it with wire (could be wrapped in foil) and laid it in a bed of coals to bake an hour or so. The mercury becomes absorbed into the potato and the gold will be shiny and free. Drop the potato immediately into a pail of cold water. The beads of mercury will ooze out and drop to the bottom to be retrieved and used again. BE SURE TO DISCARD THE POTATO REMAINS SO NO PERSON OR ANIMAL WILL EAT IT!!! DO NOT BURY IT!!! Fine gold can also be salvaged by mixing water and oil together in a container. Shake well, then let the black sand settle. The oil will rise to the surface bringing the gold with it. (This should be the only time you use gold near oil) This process is called “frothing.” Gold re-agents and frothers can be purchased from chemical companies very reasonably priced.