What the most popular crafter gear is for each profession
The most popular gem on the Armory is the Runed Scarlet Ruby. (I'll pause a moment for all your dramatic gasps of shock.) It's almost three times as popular as any other gem cut, presumably because the +19 Spell Power gem is worthwhile to the largest cross-section of characters: any spell caster. (Strength gems only really work out for the three plate-wearing classes, for example, while the rest of the physical types tend to rock raw Attack Power.) A close second to the Runed Scarlet Ruby, Aion kinah according to WoWPopular itself, is the Runed Cardinal Ruby. The epic level pattern is probably slightly less popular because the epic gems are more difficult to come by. There will be proportionally more alts and dusty characters wearing the old blue-quality gem.