is ther any way other than a lab to tell if i have found raw silver, color, how hard or any tricks to tell??
546834
Native silver, that is to say pure silver, is very rare.  Most silver is locked up in other minerals.  Galena, the primary lead ore, looks something like silver, but has only 6-10% silver in it.  Silver is found in the sulfide enriched zones of copper mines, in tellurides, and many other ores.  Here's a few rockhound links,  just search Silver or Ag, and/or ores, and big pix will come up.\n\n\nhttp://www.mindat.org\nhttp://www.mining-technoloy.com/projects/index.html\nhttp://www.earthsci.org/teacher/bgasicgeol/resource.html  \n\nand of course the one site every one in earth science must know:\nhttp://www.rockhounds.com/rockshop/table.shtml\n\n\nThere are many tricks, but hardness isn't one of them.  Blowpipe analysis, which you can do, knowing the local geology, making friends with rockhounds, varous acid & base reactivies will all help.  Read eveything on these sites, and maybe a book or three on your area.
113666
You can type in a good description of the coin, it's likely that someone out there has another one just like it.  Otherwise, take it to a coin shop.
986366
There are so many things you have to check, (these steps are applicable for the new currency notes)\n1) Check for the silver line, which you can see little bit outside and little bit inside, you cann't see silver colour continously.\n2) On right side of the currency note(front side) u can see the number 500/1000 as in dotted lines, you can see only in deep look.\n3) See the currency in light(sun light) you can see the 500/1000 number in the bottom of the currency, normally u can see only half number.\n\nand there are more steps to see the currency, i think this is more than enough. If you need more, you can check more, are contact me.
460409
Just guess what the colors would be for different compounds before you actually do the flame test for the hypothesis.  \nOr you could guess whether it is the cation (the positively charged metal ion) or the nonmetal anion that is responsible for the different colors.
375662
Take timer and thermometer.\n\nHeat the first metal, and check temperature every 5 seconds or so and write the temperature in a table.\n\nDo it with all the metals you want to check and compare the results.\n\nit should take about an hour depending on how many differnt metals you want to check, and it dont cost much.
284631
The stones are likely insoluable salts of calcium, magnesium. A chemical analysis to show presence of these could be easily performed by dissolving in acid and using flame photometry. That will only give you a 'yes or no' answer. A definitive chemical analysis is likely beyond the scope of a school lab.
943429
No they don't.  The silver stuff you see is Amalgram.  In fact most now use another substance- or two other substances actually, both of which are white colored and not quite as durable.  Composite fillings and Isonomers.
527880
Use an eraser.It will take off tarnish and makes copper shine like new.For silver coins...Boil water in an aluminum pan ,add coins then add baking soda and remove from heat.Baking soda will cause a reaction and instantly clean the silver.Just rub w/ clean cloth afterwards.
773115
you can surely rule out some things based on the type of plate you are using.  assuming that you have covered that base, you can separately pick a colony that you think may be a contaminant and look for differences in growth patterns, color, morphology, gram stain, growth on other media, and if all else fails, you can sequence it to find out exactly what it is.
1099415
I don't know how you are precipitating out the gold, but I don't think a colorimetric test for gold in solution is possible.  It is non-reactive and does not ionize.  Given that gold has filled upper electron orbitals, you might be able to run a UV-VIS spectrum and get some UV absorption for solvated gold versus clean aqua regia.  The UV apsorption is probably going to be in the lower UV wavlengths, and it might not be possible to differentiate between trace levels of gold and trace levels of transition metal impurities.\n\nIf you are precipitating the gold by an equilibrium process, just load up on your precipitation compound to push the equilibrium as far as possible to one side.  Another possibility is to electrolytically remove any trace gold from the aqua regia.  Sorry I don't have any better suggestions.
740769
USE DIFFERENT STAINING FOR BACTERIA EX. GRAM STAINING. LOOK UP DIFFERENT BACTERIA STAINING
1066350
It won't show you a "white hand" that I know of. I know after it has finished scanning my computer, it tells me whether or not if has found anything. If it has found something, it ask what I would like to do... Quarantine the files or delete them permanently.
390838
To know whether it is a metal you can check its electrical conductivity. To know whether it is specifically palladium you can use mass spectrometer or a x-ray diffraction measurement.
494816
The best test is a streak test. If you are not familiar with this, it is when you rub the mineral across a piece of unglazed porcelain plate or tile.\n\nIn a streak test the gold will leave behind a gold streak while pyrite will leave behind a black one. This works, trust me, I know. All you need is a piece of unglazed porcelain.\n\nYou said earlier about rubbing it across the skin. I have never seen this work however some cheap jewlery is made of pyrite & will leave the fingers, etc. black looking. That is after you wear it a while.\n\nGold is very dense for its size. Pyrite is not nearly as dense. You could do a density test by displacement in water but I assume from what you told me that the "gold" is in a matrix.\n\nPyrite is usually found as a mass of cubic crystals. Sometimes they take on the appearance of a nugget b/c the cubes are very tiny. Gold will not have these cubes.\n\nGold is sometimes found in quartz veins. If you have a chunk of quartz it is possible that there is some gold in there.\n\nGo with the streak test & let us know what happens.\n\n:)
1130690
try netdetective.  that sight is reliable.
349278
take it to a bank and have them check it. \n\n2.00 bills are older, so the watermark may not exist, if they were made some time ago.\n\nGenerally the feel of a counterfeit bill is smoother than a true bill. \n\nThe Bank will know. \nGood luck.
1096251
One easy quick & easy way to find out is the streak test. Rub the mineral in question across an unglazed porcelain tile. If the streak it makes is black then it is pyrite (fool's gold). If it is golden yellow then you have gold. You can find these tiles in your local home & garden shop or hardware store.\n\nAnother simple one is the hardness test. Gold has a hardness of 2.5 to 3 on Moh's Scale. Pyrite is 6 to 6.5. Glass has a hardness of about 5.5. According to Moh's scale you should be able to scratch glass w/ pyrite but not w/ gold. Pennies can also be used as their hardness is about 3.5.\n\nGold is found in several different forms or habits. It can be dendritic (vein-like) or massive as in nuggets. Upon examining pyrite more closely (perhaps w/ a 10x magnifier) you will see that while it resembles a gold nugget it is actually made up of many tiny little cubes.\n\nGold will not cleave whereas pyrite will. Cleavage is simply how a mineral breaks evenly due to weaknesses in its crystal structure. Pyrite has cubic cleavage so that when it is hammered it will come apart in perfect little cubes.