1. Antimatter, 2. Californium 252, 3. Painite, 4. Diamonds, 5. Tritium, 6. Taaffeite, 7. Plutonium, 8. LSD
Cost: $100 trillion per gram
Antimatter could possibly fuel spaceships to the planets, and maybe the stars, in the years to come.
2. Californium 252
Cost: $27 million per gram
The Californium isotope is used in devices that find layers of oil and water in oil wells.
Cost: $300,000 per gram or up to $60,000 per carat
Thought to be the rarest gem mineral, it can be used in crystal healing or just make a pretty collectible.
Cost: A colourless, 1-carat can cost more than $65,000 per gram, or $13,000 per carat
Diamonds are a special jewellery item.
Cost: $30,000 per gram
Tritium is used in self-luminating EXIT signs found in theatres, schools and office buildings. There are more than two million tritium EXIT signs in the United States.
Cost: Anywhere between $2,500 to $20,000 per gram or $2,400 per carat
The mauve-coloured gem is thought to be more than a million times scarcer than diamonds. And while it’s a bit too durable to use often in jewellery, if you’re lucky enough to find one, don’t let your hands off it.
Cost: Roughly $4,000 per gram
It makes things nuclear. There are two kinds of plutonium that can be used, for either military purposes or nuclear reactors.
Cost: The crystal form of LSD costs about $3,000 per gram
Popular in the 1960s, this substance is known to cause hallucinations.