Alien Planet Made of Diamond Discovered - http://www.space.com/12731-d...
Aug 26, 2011
from
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This illustration shows the alien planet around pulsar PSR J1719-1438, where ultra-high pressures caused carbon to crystallize in the remnant of a dead star. The planet is made of diamond and orbits a dense pulsing star with a radius smaller than that of our sun."
- April Buchheit
No mention of how many carats it is, though.
- Andrew C (✔)