The Cornerstone has always been an important wine within the Reyneke range, with the proceeds of the wine helping the farm workers and their families. The workers being the cornerstone of the business. The components consist of 37% Cabernet Sauvignon, 36% Merlot and 27% Cabernet Franc. An intense sorting process of bunch selection and berry selection ensures that the best fruit from our Biodynamic vineyards are selected. Fermentation takes place in concrete Nomblot fermentors. The wine spends 18 months in French oak barrels, 30% new and 70% second and third-fill. An additional 4months in tank, after barrel selection and then left in bottle to mature before being released.