A white wine variety indigenous to the island of Korčula. You’ll easily recognize it since its berries are of very different size, like in the picture below.
Until recently, Grk was wild and untamed, very specific, not for sophisticated palates, and local people usually produced the wine in small quantities for their own use (or misuse). Now there are several young and enthusiastic producers who are trying to make a modern, good quality wine from Grk (like Cebalo and Bire wineries). It certainly has a good potential because it has a great story to tell.