I found the details of Cicco at http://www.diamondyarn.com/cat.php?yarnID=839:
56% Wool, 35% Nylon/Polymide, 9% Acrylic
Polar Weight (Fancy Type)
50 grams and 100 meters per ball
7 mm ~ 10 1/2 or 11 US needle size
YARN GAUGE: approx. 4 in x 4 in knit square = 18 rows and 11 stitches
FYI, none of the online stores linked to by the diamond yarn site carry Cicco, so don't bother looking. I just searched eBay, too, and no Cicco is offered at present.
Does anyone have a comparable yarn suggestion for the Paris Loop project? Otherwise we'll all have to flood Gedifra with letters begging for the return of Cicco!