Graciano is a blending grape native to Rioja. It is used to add aromatics, tannins, and acidity to Rioja wines. Its production is very small, accounting for only 4% of the total grapes grown in Rioja. It is usually found planted in between the other grape varietals in the vineyard. If you want to impress your friends and sound really cool, you should pronounce it like Grathiano, because that's the way they say it in Spain!