Is there anything known that's harder than Diamond?

Question

Diamond measures about 800 GPa on the Rockwell's Hardness Test. Is there any known material that is harder by measurement? What is the value of the hardness expressed in GPa?

Answer 1

according to the Talc's hardness table , it is the hardest.

Answer 2

I'm pretty sure when I get an errection that it is harder than a diamond.

Answer 3

I'm pretty sure that diamonds are just the hardest NATURAL substance.

Answer 4

No, not according to Dig. The address is: http://digg.com/general_sciences/Nothing...