AeroGel, It cost About $300 billion per milligram.
Just a comment here: That is debatable. The very chemical composition of AeroGel makes it about 99% air. That means its actual mass at that weight (1 milligram) is considerable. If you are going for "most expensive material on earth" by actual amount/size/mass, it's probably antimatter. Again, debatable. Oh, almost forgot: the last time I did any research on this, antimatter (especially antiatoms like antihydrogen), were at $1,750 trillion US Dollars (USD) per ounce.
Diamonds
The Kuwaiti Dinar is the most expensive currency in the world.
The most expensive money in the world is the Kuwaiti Dinar.
The most expensive diamond, by definition, is priceless.
The most expensive company in the world is, Saudi Aramco. Revenues over 240 Billion a year.
Diamonds
I don't know about top 5 but the most expensive material to ever exist was anti-matter. It cost 62.5 TRILLION dollars per gram.
the most expensive material used to make a casket, bronze, is considered by the industry to be the material most suitable for casket construction due to its strength and natural ability to resist rust
The iPhone 4
Rock is the most abundant material in the crust.
The Iron at the Earth's core is magnetic and is the most abundant, at the earth's crust, Lodestone is the most abundant naturally occurring magnetic material.
Depends on what type of material it is, where you buy it and if its cheap or not.
No,the second most abundant
dark green emeral is the most expensive thing on earth and olso i have some dark green emerald
Yes it is.
The most expensive fiber material is vicuña wool, which comes from the rare and wild vicuña animal found in the Andes region of South America. Vicuña wool is highly prized for its softness, warmth, and rarity, making it one of the most luxurious and expensive fiber materials in the world.
Very simple, because the material is more expensive. http://www.seatcoverset.com/seatcovers-car_seat_cover.htm