Chemical elements are building blocks of everything we see around us. There are 118 recognized elements, 94 of which occur naturally including iron, silver and gold, while others are synthetic, some examples of which are curium and californium. This list contains 10 earth elements that are extremely rare, and some of them have demand in the market, which makes them some of the most expensive elements on the planet.
Although one gram of francium has never been observed. Because The half life of this element is about 22 minutes, which means any viewable quantity of the element would immediately vaporize. But it is assumed that francium would appear as a highly reactive metal.
The largest amount of this element that has ever been produced in the laboratory was a cluster of more than 300,000 atoms. If someone want to buy one gram of it, he can expect to pay at least few billion dollars. Although nobody would be willing to pay billions of dollars for something that will disappear within minutes and has no practical use whatsoever.
Gold : $56 per gram
Gold is one of the most widely known and used elements in the world, especially in jewelry. Almost every ancient civilization on earth considered this metal to be valuable. Science, it also proves that some of the characteristics of gold makes it perfect for electronic use, though high cost is the biggest hurdle to use it in wires. So, we’re stuck with cheaper and inferior alternatives.
In the purest form gold is a bright, slightly reddish, soft, malleable, and ductile metal. Gold is one of the most demanded rare earth elements, making it tenth most expensive elements on earth.
11Rhodium — $58 per gram
The major use of rhodium is in automobiles. It is used as a catalysts in the three-way catalytic converters. The biggest quality of this metal is its inert behavior against corrosion and most aggressive chemicals. The rhodium is also used in jewelry. Particularly, as a thin plating on white gold to improve its appearance, and sterling silver is often rhodium-plated for tarnish resistance.