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?
The 15 Most Expensive Materials in the World - Hello Travel Buzz
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The 10 Most Expensive Materials in the World, by Ravi Sharma
World's most expensive material costs $62.5T per gram
Climbing Archives » Explorersweb
10 Most Expensive Materials in the World
The 10 of the most eye-wateringly most expensive materials on Earth - Interesting Engineering
The 15 Most Expensive Materials in the World - Hello Travel Buzz
The 10 Most Expensive Materials in the World, by Ravi Sharma
A $39,000 Turd: Fossilized Viking Poo Is World's Most Valuable Excrement » Explorersweb
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Early Settlers in Canada Lesson Plans & Worksheets
