Pouilly-Fumé is one of the Loire Valley’s most celebrated and distinctive appellations — and silex is the soil type that makes it truly extraordinary. Silex — the ancient flint that underlies the finest plots of Pouilly-Fumé — gives the wines grown above it a mineral character of quite remarkable precision and intensity: that unmistakable gunflint smokiness, that struck-flint quality on the nose, that speaks of a wine that could only come from this specific soil in this specific corner of the Loire. Domaine Chatelain is one of Pouilly-Fumé’s most respected and characterful producers, farming their silex plots with a commitment to terroir-driven winemaking and a deep understanding of what makes this extraordinary appellation so special. Les Chailloux — named for the flinty stones that characterise the vineyard — is their flagship silex expression, and the 2025 is a textbook example of Loire Sauvignon Blanc at its most compelling. The nose is arrestingly precise: white grapefruit, green apple, and fresh elderflower shot through with that unmistakable gunflint smokiness that only true silex can deliver. On the palate it is taut and focused, with razor-sharp acidity, a beautifully concentrated mid-palate, and a long, mineral-driven finish that lingers with real intensity. A serious, terroir-driven white that rewards every sip.