question about runewords

[melk]

Ok I got a 3 socket mask and want to know if I put delerium in the helm can I then later upgrade the mask with the cube's upgrade recipies?

for example
1 Tal Rune
+ 1 Shael Rune
+ 1 Perfect Diamond
+ Delerium (mask)
__________________
Delerium (death mask)

[ProfessionalBerg]

No. You can ONLY upgrade rare and unique items. Runewords are not unique items, even if their name is written in gold.

That is why some rare socketables (like superior Archon Plate) are so expensive.