16 Most Expensive Materials In The World
Introduction
When people think of expensive materials, gold and diamonds usually come to mind. But the world of valuable substances extends far beyond these familiar treasures. From exotic metals used in space exploration to artificial elements created in nuclear reactors, some materials cost more than their weight in goldβoften by staggering margins.
What makes these materials so expensive is a combination of factors: extreme rarity, complex production processes, unique properties, and specialized applications that no cheaper substitute can replace. Here are sixteen of the most expensive materials on Earth.
1. Antimatter β $62.5 Trillion per Gram
The undisputed champion of expensive materials is antimatter, valued at an astonishing $62.5 trillion per gram . This is not something you can mineβit must be created atom by atom in particle accelerators like CERN’s Large Hadron Collider .
When matter and antimatter meet, they annihilate each other completely, releasing pure energy. This makes antimatter incredibly difficult to produce and store. Since 1995, all global experiments have produced only about 10 nanograms total . The production process consumes massive amounts of energy, and antimatter must be contained in special magnetic “bottles” to prevent it from touching ordinary matter .
2. Endohedral Fullerene β Over Β£106 Million per Gram
This substance consists of carbon atoms arranged in a cage-like structure with a nitrogen atom trapped inside . Its complex synthesis and unique properties make it one of the most expensive materials ever created, with prices exceeding Β£106 million per gram .
3. Californium-252 β $27 Million per Gram
Californium is a synthetic radioactive element first discovered in 1950 at the University of California, Berkeley . It is produced in nuclear reactors by bombarding other elements with neutronsβa slow, difficult, and extremely expensive process .
One gram of californium costs around $27 million, which is worth more than 200 kilograms of gold . It is used in nuclear reactors, cancer treatment through neutron therapy, space exploration, and detecting hidden nuclear materials .
4. Red Diamonds β $4.7 Million per Gram
Red diamonds are among the rarest gemstones in the world, with fewer than thirty known specimens in existence . Most come from a single mineβthe Argyle mine in Western Australia, which closed in 2020 .
Unlike other colored diamonds that get their hues from impurities like nitrogen or boron, red diamonds are a mysteryβscientists believe their crystal lattice is distorted during formation, creating the unique color . Most red diamonds weigh less than one carat, making larger specimens extraordinarily valuable.
5. Bennu Asteroid Samples β $9.6 Million per Gram
When NASA’s Osiris-Rex mission returned to Earth in 2023 with material from asteroid Bennu, it marked a historic achievement. The mission collected 121.6 grams of dust and rocks, making it the largest cosmic sample collection beyond the Moon .
The samples are valued at approximately $9.6 million per gram based on the mission’s $1.1 billion cost divided by the material collected . These samples are invaluable for research into how life on Earth began and future asteroid mining possibilities.
6. Osmium-187 β Up to $10,000 per Gram
Osmium is among the densest and rarest metals found on Earth. The isotope osmium-187 is particularly valuable, with prices reaching as high as $10,000 per gram . Kazakhstan is considered the leading source of pure osmium-187, with its production controlled through a state-operated monopoly. In December 2021, Ukrainian authorities intercepted an attempt to smuggle just 10.05 grams of the metal .
7. Taaffeite β $12,500 per Gram
Taaffeite is a gemstone that is a million times rarer than ordinary diamonds . It was discovered in 1945 by Austrian gemologist Richard Taaffe, who noticed a stone that didn’t match any known mineral. Prices range around $2,500 per carat (0.2 grams), which works out to approximately $12,500 per gram .
8. Benitoite β $42,500 per Gram
Benitoite is an extremely rare blue gemstone found primarily in California. With the rarest varieties costing up to $8,500 per carat, a gram can reach approximately $42,500 . It was designated California’s official state gemstone in 1985.
9. Plutonium β $4,000 per Gram
Plutonium is a radioactive element that is used in certain nuclear reactor processes and has applications in nuclear weapons. Priced around $4,000 per gram, it is extremely rare and only found today in trace amounts in uranium . It must be produced artificially in nuclear reactors, contributing to its high cost.
10. Tritium β $30,000 per Gram
Tritium is a radioactive isotope of hydrogen that glows in the dark, making it valuable for self-illuminating exit signs and watch dials . It is produced naturally in the upper atmosphere but must be manufactured for commercial use . At $30,000 per gram, it costs more than many new cars .
11. Coral Snake Venom β $4,000 per Gram
Coral snake venom is prized for its antiviral and antibacterial properties in medical research. It costs approximately $4,000 per gram, reflecting its pharmaceutical applications . Coral snakes have the second-strongest venom of any snake after the black mamba .
12. Iridium β $171 per Gram
Iridium is the most corrosion-resistant metal on Earth and is used as a hardening agent for platinum alloys. At approximately $4,800 per ounce, a gram costs around $171 . South Africa and Russia are the main sources, as it is mined as a by-product of nickel .
13. Rhodium β $155 per Gram
Rhodium is the most expensive precious metal, trading around $185 per gram . Over 80% of global rhodium production comes from South Africa, with annual production at just 30 tonnesβcompared to 2,500-3,000 tonnes for gold . Its primary use is in catalytic converters to reduce vehicle emissions, and its price is extremely volatile due to demand fluctuations .
14. Caterpillar Fungus β Up to $110 per Gram
This strange substance is a hybrid fungus that infects and kills caterpillars, and it has been used in Tibetan and Chinese medicine for centuries . It appears for only a couple of weeks each year in remote parts of Nepal, India, Tibet, and Bhutan, making it rare and difficult to harvest . A single gram can sell for up to $110, and experts believe up to 80% of household income in the Tibetan Plateau comes from selling this parasite .
15. Ambergris β $35 per Gram
Ambergris is a waxy substance produced in the digestive system of sperm whales, and it has been historically prized in the perfume industry . It is now illegal to buy or sell in many parts of the world because sperm whales are protected . Online estimates value it at around $35 per gram .
16. Soliris β $22,767 per Gram
Soliris is a drug used to treat ultra-rare diseases, and it is among the most expensive medications in the world . A 300mg vial costs approximately $6,830, which works out to about $22,767 per gram . The Patented Medicine Prices Review Board ruled that the manufacturer sold the drug at an excessive price from 2009 to 2015 .
About the Author
My name is Dua Qamar, and I am a content writer passionate about exploring the fascinating intersections of science, technology, and value.
Why I Wrote This Article:
I wrote this piece because the world of expensive materials is far more diverse than most people realize. The substances on this list range from theoretical physics to deep-sea biology, from nuclear medicine to space exploration. Understanding what makes them so valuableβand so expensiveβoffers a window into the cutting edge of human achievement.
How I Approached This Topic:
My research involved examining scientific reports, industry publications, and auction records to compile accurate price estimates. I focused on materials with well-documented price data and fascinating stories behind their value.
Who This Article Is For:
This article is for curious readers who enjoy learning about the rare, the valuable, and the extraordinaryβwhether it is a material worth trillions per gram or a fungus that sells for more than its weight in gold.
The Message I Hope Readers Take Away:
The most valuable things in the world are not always the most obvious. From the depths of the ocean to the edge of space, the substances that command the highest prices are those that require the most extraordinary effort to obtain.
Written by: Dua Qamar
