The 'Virgin Rainbow' is one of the world's rarest and most expensive opals. This extremely rare opal exhibits incredible fluorescence with a rainbow of different colors that make opal so distinctly ...

An opal so fine it has been valued at over $1 million is about to go on public display for the first time. Michelle Starr is CNET's science editor, and she hopes to get you as enthralled with the ...

Algae can be glamorous, too: In the crisp, clear waters off the Atlantic coast in the United Kingdom, an unassuming, bushy seaweed glows in deep blues and greens. It turns out that this species is ...