The most expensive element on Earth: $1 billion per gram!
Price Comparison (Most Expensive Substance)
Comparison | Most Expensive Materials In The World - price/gram
11 Most Expensive Materials in History - You May not Know These
12 Most Expensive Metals In The World
Most Expensive Materials On Earth
9 Most Expensive Materials On Earth Revealed - I Bet You Didn't Know Some Of This
World's Most Expensive Materials...
10 Most EXPENSIVE Substances On Earth
The world's most expensive object by weight
Comparison: Most Expensive Materials
The Most Expensive Substances In The World | Price Comparison
World's Most Expensive Materials!
7 Most Expensive Metals
Most EXPENSIVE Substances In The World!
Most Expensive Material on Earth Ever Produced.
Most Expensive Metals , Only 1 Gram Of This Material Is Worth Billion Dollars
THE MOST EXPENSIVE MATERIALS IN THE WORLD
Top 10 Most Expensive Substances
This metal is more valuable than gold