By A Mystery Man Writer
No, it's not a Moon or Mars rock, a meteorite, a white diamond, or a rare radioactive element. Can you guess what it is?
World's most expensive material costs $62.5T per gram
The 15 Most Expensive Materials in the World - Hello Travel Buzz
THE R2D2 MODEL Read, Reflect, Display, and Do - school website
The 10 Most Expensive Materials in the World, by Ravi Sharma
What was the highest mountain in the world before Everest was discovered? – Mark Horrell
World's most expensive material costs $62.5T per gram
A $39,000 Turd: Fossilized Viking Poo Is World's Most Valuable Excrement » Explorersweb
The 10 Most Expensive Materials in the World, by Ravi Sharma
Everest-Lhotse Adventure Consultants
An introduction to ExplorersWeb, the adventurers' website on a new journey – Mark Horrell
The 12 Most Expensive Materials In The World / Bright Side