Antimatter is by far the most expensive material on Earth. Although only very small amounts have ever been produced, there is currently no way of storing them.
1. Antimatter is so rare it costs trillions per gram.
The rarest stable metal is tantalum. The rarest metal on earth is actually francium, but because this unstable element has a half life of a mere 22 minutes, it has no practical use.
International Space Station: $150 Billion
The most expensive thing in the world is related to the Universe and it is the International Space Station. The amount which has gone towards its existence in terms of building and designing is $150 billion.
In fact, we are sure you would struggle to come up with the answer if you didn't already know what it is. The most expensive man-made thing in the world surprisingly, does not even exist on the Earth. It is none other than the International Space Station (ISS) and it took more than $100 billion to make.
The International Space Station ranks in the Guinness World Records as the most expensive thing ever created at $150 billion to develop and build.
1. Antimatter is so rare it costs trillions per gram.
"One 100th of a nanogram [of antimatter] costs as much as one kilogram of gold," he says. After a bit of number crunching that means a gram of antiproton antimatter would cost an absurd 5 quadrillion euros. That's 5 thousand trillion euros.
Baby Cashmere
The fabric is extremely rare since it can only be collected only once, from goats that are between 6 and 12 months old. Although each goat yields approximately 30 grams of fibre, the material produced is warm, comfortable and smooth.
Ammolite. In 1981, the World Jewellery Confederation (CIBJO) declared ammolite a new organic gem. Occurring in limited deposits in the Rocky Mountains, this gem material is much rarer than diamond.
RHODIUM: TOP MOST VALUABLE METAL
Rhodium is the most valuable metal and exists within the platinum group of metals. It is used in jewelry for a final finish on white gold jewelry. It occurs in the very same ore in which gold and silver exist – only, in smaller quantities.
Due to its explosive nature (it annihilates when in contact with normal matter) and energy-intensive production, the cost of making antimatter is astronomical. CERN produces about 1x10^15 antiprotons every year, but that only amounts to 1.67 nanograms.
Weapons-grade enriched uranium, of which uranium-235 comprises at least 93%, , is much cheaper, though twice as expensive as gold – around 100,000$ per kilogram.
Beluga caviar
Siberian sturgeon caviar is one of the most expensive foods on the planet, prized for its salty, earthy taste. Iranian Beluga caviar is officially the world's most expensive – a kilo will set you back 20,000 pounds. If you're up for a splurge, a 30g tin from The Truffle Man costs a whopping $157.
Diamond is the hardest substance found on earth in so many natural forms, and it is an allotrope of carbon. The hardness of diamond is the highest level of Mohs hardness - grade 10. Its microhardness is 10000kg/mm2, which is 1,000 times higher than quartz and 150 times higher than corundum.
If 1kg of antimatter came into contact with 1kg of matter, the resulting explosion would be the equivalent of 43 megatons of TNT – about 3,000 times more powerful than the bomb that exploded over Hiroshima.
The cost of 1 gram of antimatter is about 62.5 trillion dollars (around 5,000 billion INR).
Andrew Krioukov - Co-founder and CEO - Antimatter | LinkedIn.
Since the energy per fission from plutonium-239 and uranium-235 is about the same, the theoretical fuel value of fissile plutonium can be put at $5,600 per kilogram.
The value of this plutonium, according to DOE defense programs officials, is about $23 per gram.
The Most Expensive Item Sold on eBay
The most expensive thing ever sold on eBay is a Gigayacht, which sold for $168 million. Designed by naval architect Frank Mulder, this 405-foot-long yacht was sold to the Russian billionaire Roman Abramovich in 2006.
The 5 most expensive items ever sold on eBay
Former owner of Chelsea F.C Roman Abramovich has the record for spending the most buck on eBay after buying a 405-feet long super yacht for £140.3 million. The yacht was sold in 2006 and is worth a whole £136.2 million more than the second-most expensive eBay item.
The Mona Lisa
The criminal, Vincenzo Perugia, was a handyman working at the Louvre, where the painting is displayed. In 1911, he hid in a closet until the museum closed and then took off with it with two other handymen.