because they make most all of the alluminum used
i am guessing but its probably because there is more aluminum than gold
Aluminum does not occur in nature as a solid metal. It is produced by man in several processes which require lots of energy. These processes were not invented until the 1880's. So, until then, aluminum was scarcer than gold and therefore more expensive.
For homework: Aluminum is about 7 times more expensive than steel. A full answer: Basically: Aluminum is more expensive. And during 2011 is expected to go higher, because of less demand. Although the price of steel is constantly on the raise. BUT, in some cases making things from steel can turn out to be more expensive. Like boats. But again, in the usual case Aluminum is more expensive. How much more expensive depends: There are different kinds of steel. Also, it depends on how much material you'll need. Sometimes a small amount of aluminum will suffice for a much larger amount (in weight) of steel you would need for the same task. In that case making your project from aluminum will cost less than from steel. But the raw cost of steel is still cheaper than that of aluminum. (The reason is that aluminum, although more "abundant" - meaning found more on the surface of earth, is harder and therefore more expensive to retrieve). The most significant cost difference, is the cost of work: tools, knowledge and the price for fixing mistakes. Working with aluminum is much more expensive than steel. In 2002 (before the price rise of steel) it was 4.2 times more expensive to make a car from aluminum, than from steel. But then a comparison by a boat maker shows that its EASIER to work with aluminum, if you use its features to your advantage: (No need to paint submerged parts, build without bending, use standard profiles etc.) and easier to sell. And then it depends if you need to use new material or can use scrap. Today (March 2011) iron ore (the main part for making steel) is 4 and a half cents per pound, while aluminum is a dollar and 14 cents! 0.045 vs 1.14. That's Aluminum over 25 times more expensive than iron. (But then again, steel is about 3.5 times more expensive than iron, so aluminum is about 7.2 times more expensive now. Please understand that a shortage (like the one during the Chinese Olympics a few years ago) can make the price of steel rocket up, and change everything. So you never know what will be. But currently, Aluminum is more expensive. By the way, Mary Antoinette had a set of cutlery (knife, fork and spoons) from aluminum, that was at that time just discovered, and more expensive than silver.
69 dollars a pound
Up until the late 1800's, Aluminum was extremely valuable due to the fact that it was very hard to procure. As an example of just how prized a metal it was, Napoleon Bonaparte was said to have a special set of aluminum utensils only to be used by his most esteemed guests. His gold utensils were for more casual occasions! Also, atop the Washington Monument sits an almost 3 kg pyramid of aluminum, placed as a symbol of how strong and wealthy the U.S. was. In 1886, the Hall-Heroult process was invented as cost-effective way to produce aluminum. Since then, the value of aluminum has been significantly reduced.
Gold, silver, tin, iron, aluminum.
Aluminum used to be more expensive than gold. In Napoleon's time the chemists hadn't discovered a good way to purify aluminum so pure aluminum was expensive and rare. Aluminum used to be a status symbol because it was more expensive and rarer than gold.
More rare stronger and better looking
Gold is much more dearer these days because there is less of it then aluminum. Also aluminum is a renewable source that can be used infinite amount of times. Aluminium is used more in daily life and gold is used for flourishing fashion accessories.But if we actually counted the amount of times aluminum is used then it would be most expensive.
Aluminum does not occur in nature as a solid metal. It is produced by man in several processes which require lots of energy. These processes were not invented until the 1880's. So, until then, aluminum was scarcer than gold and therefore more expensive.
Gold is much rarer (i.e. there is less of it and what there is is harder to find) than aluminum. There is also demand for gold due to special properties that it has that aluminum doesn't that increases the price. Gold is a much more attractive metal than aluminum. Gold does not corrode, while aluminum almost instantly corrodes on contact with air or water producing a hard transparent insulating coating on its surface.
Gold is tremendously more expensive than titanium.
aluminum
1 kg of aluminum has more volume.
Pure yellow gold is more expensive than an alloy.
You are wrong. Copper is NOT more expensive than gold.
Gold is more expensive at the time of writing. Palladium is about $820 an ounce while gold is about $1,340 an ounce.
Aluminium is more expensive than steel