Does BRONZE turn green with age?
612506
It not age. Its ammount of exposure to the enviorment. Oxygen with its diradical structure for example.
623904
It fades over time. You can recharge it by rubbing it on a more charged magnet piece =) This is why metals basic (like the ones in pins) can act as magnets =)
25132
If you want to identify brass versus gold, try using some ammonia solution or vinegar on the metal. Brass has oxides which will be dissolved and the brass will come out much brighter. Gold does not oxidize and will not react. Highly polished brass will not have an oxide coat to remove, so you can test it by immersing it in a solution with 2/3 vinegar and 1/3 hydrogen peroxide solution, and leave it for more than fifteen minutes. If it is brass and not gold, the solution will begin to turn green as the copper in the brass begins to dissolve. Again, gold will not react.
183774
oxidized copper is green
970451
There are two things that could be happening.\n\nFirst, there's a strong concentration of ferrous material in your well water. This will leave an orange (rust-colored) deposit on the sink as the liquid evaporates. So it actually isn't the "water" making your sink change color. It's just a deposit of another material that's been dissolved or suspended in the liquid.\n\nSecond there's the fact that your sink may already be made of metal, and the constant exposure of the water and air to the bare metal surface (like if you chipped the porcelain) will actually rust the SINK material. In this case, it really is your sink changing color ... the water is just part of the chemical process of oxidation.
1073809
Actually, the metals or their oxides are being deposited on your skin.  Color changes can be accelerated by acidity and moisture from your skin.\n\nYou can slow the reaction down if you want to wear some jewelry by coating it with a thin coating of vaseline.  This will keep it from getting wet from your skin as easily.
407391
When Copper Oxidizes, it turns green over a long time...  This is called "Patina"...
693117
When the phone goes green green, I pink it up, and say yellow
1044794
No it isn't.  The green comes before the blue.\n\n\n,
728338
Man made emeralds are usually dark green.  Natural are usually lighter in color but of course still green.   Natural stones you can see into the stone, man made you usually can not.
516489
no because over time it starts to look ugly, i don't own silver jewelry...just not worth it!!... personally platnium is nice ;-)
109451
Cheap rings are often made of copper with a thin layer of silver or gold over them.  Copper turns green when it is oxidized (look at a copper water fountain, for example), which occurs whenever it is in contact with air, but speeds up considerably in the presense of water.  The sweat from your finger, as well as water from washing your hands, etc., causes the oxidation reaction to occur relatively quickly.  Some of the oxidized copper from the ring is then transfered to you finger, turning it green.
756990
Generally, it stays a gold colour.\nIt will vary with the temperature, between hughes of yellow, almost to white, at high temperature, but not white, and only at really high temperature.\nThere is a green that shows, particularly with impurity, and this may be a trick question. They may call a hugh of yellow, "green", and molten, it is a yellowy/green, light colour at high temparature (superheating, when casting) but essentially, its yellow, or, "gold" colour.\nWhy not paste this as your answer.\n(jeweller 20 years...ive melted the suff!)
347727
3534 were built. The only green was bright green metallic.\n Don't know how many were green
196165
NaHSO4 itself is acidic, so the solution's color should be yellow due to the bromcresol green being in the presence of acid
888663
just print out lots of color stuff until the old pinkish colors fade\n\nGot to agree thats an amusing gambit
875705
yes it doez. 1st u start out dark red and heavy & then it gets lighter and lighter until...POP...ure done 4 another month. :) this sucks. minez is next week. :( thanks 4 reminding me... :(