You know when you're trying to get your empty Zippo lighter to work and all that comes out is that stinky spark? That's the smell of flint burning, an acrid aroma that supposedly occurs in dry white wines made from grapes that were grown in cool regions with limestone-rich soil, such as French Chablis and many white wines from the Loire Valley (Pouilly Fumé́ in particular). Wines that smell flinty often taste stony or minerally as well. Yes, it seems rather unappetizing, but it's actually a sought-after quality for French white wines.