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A shiny, light yet strong metal which is used extensively in industry. It is quite reactive but protected by a thin transparent layer of oxide.
 I-Beam I-Beam.
Aluminum can be used as a structural metal, for example in I-beams like this one. The fact that iron is used much more often is strictly due to its lower cost and easier welding, in virtually all other ways aluminum is superior. Bridges made out of aluminum would never rust, but they would cost many times as much to build.
Source: Scrap yard
Size: 5"
Purity: >95%
 Ingot Ingot.
This ingot is cast from an alloy of aluminum containing a few percent of silicon, which reduces the surface tension of the molten metal, allowing it to flow into details in the mold.
Source: Scrap yard
Size: 4"
Purity: >95%
 Coins Coins.
Aluminum coins have a rather cheap feel to them: They definitely give off an air of not being worth much, which perhaps explains why aluminum is not used for anything other than the most worthless coins, like these Japanese yen coins (worth about a penny, plus or minus, depending on the exchange rate).
Source: Various
Size: 1"
Purity: 99.9%