Tangy and driven by wet slate — rather than fresh fruit — character, Villa Bellangelo 2012 Dry Riesling ($19) is a reminder of just how difficult it is to make great dry riesling. It’s very minerally on the nose — think wet river rock and slate — with background notes of Granny Smith apple, just-ripe pear and apple blossom. Lighter bodied, the palate is so slate-y as to be almost salty, with faint lime and grapefruit zest flavors as well. The acidity is bitter-pithy rather than juicy. The mid-palate is a bit hollow, but the finish is long and appetite…