Whats the most valued stone/gem in the world?

Question

Whats the most valued stone/gem in the world?

Answer 1

I think  it is diamond or it is  agate

Answer 2

According to the following articles, it is the Fiery Red Ruby

http://ezinearticles.com/?The-Fiery-Red-...

http://searchwarp.com/swa266766.htm

Answer 3

Jadeite.  In the US, it retails for at least $3 million per carat - if it's even available at all.

Answer 4

Per carat prices for natural, untreated red diamonds have so far ranged from about $800,000.00 to $1.9 million which makes this substance the world's most concentrated nonradiological form of wealth. Most of the time these stones are unavailable at any price, though there were reports in 2002 of a new discovery in the Lipetsk region of Russia.

Answer 5

Diamond : flawless ones

Emerald: only the deep green kind