Things that glow in the dark like some rifle sights and military lensatic compasses contain tritium.
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Information about commodities exchange is best found on a government website. There you will find accurate information about where to find them and what the laws are dealing with commodities exchanges.
Tritium lighting is made using glass tubes with a phosphor layer in them and tritium (a hydrogen isotope) gas inside the tube. Such a tube is known as a "gaseous tritium light source" (GTLS). Because tritium in particular is an integral part of thermonuclear devices (though in quantities several thousand times larger than that in a keychain), devices containing tritium are considered dual-use technology in the U.S.A., and are therefore illegal for export. However, they are widely available in the U.K., most of Europe (some countries like Belgium have outlawed them however), Asia and Australia. Tritium devices can be purchased in the UK and Australia, but are illegal for import to the United States, however they are available in the US as gunsights and for military applications. UK Source http://www.crazyaboutgadgets.com/detail.asp?ID=371 AU Source http://www.kitbag.com.au/prod849.htm USA Source (Military Personnel only) http://www.ameriglo.net/tactical_dev.htm You can also find tritium lighting in the US without having to be military personnel at http://www.unitednuclear.com. They have a limited stock, though.
If you are going to trade commodities, you should consult as many sources as possible. An investment banker, however,would not be my first choice. I would find people who do it regularly and apprentice with them. It is easy to get in way over your head in the commodities world.
To find trade commodities forex go to www.forex.com a website dedicated to showing newcomers how to trade commodities. It is user friendly and easy to learn using their sample training program.
You can learn how to trade commodities on the following website: http://commodities.about.com/od/researchcommodities/u/commodities-trading-path.htm. They have useful info.
One can find companies that trade commodities by reading a copy of the Financial Times or looking on the website. One can also find details of such companies on Market Watch.
It is very hard to find in nature. Tritium is a very rare isotope form of hydrogen, the only radioactive form of this widespread element.
Futures and Commodities is a website dedicated to following the prices of commodities like natural gas, oil, and gold among others. The site also takes a look at the past and potential future of these commodities.
A person can find the latest prices on commodities from several locations. CNN, Bloomberg News, Nasdaq, and Reuters all broadcast the latest up to date prices of commodities, both on their television channel as well as on their websites.
Software for commodities trading can be found at a stock trading website. eTrade has software available for download. Most of the software found online for commodities trading is not free.
One might find the commodities of silver on the website of Investing, at CNN Money, or on Investopedia. Each site offers pricing, charts, tables, and possibly advice.