80 decillion

Astronomers have discovered a new planet, named "55 Cancri e" in the constellation of Cancer.

It's radius is twice that of the Earth (which makes it 8 times the size of earth), and it has the same density as Earth.

Astronomers figure that at least a third of the planet is made of diamond!

By my calculation, that makes  8x10^34  or 80 decillion carats!

Before you get out your diamond pick, the planet is approximately 230 trillion miles away, and over 9000 degrees Fahrenheit.  .

To read more, here is a link:    wikipedia - 55_Cancri_e