Gemstone Vineyard is a small, family-owned winery located in the Yountville appellation of Napa Valley. Situated on a gentle, west-facing slope, the 16-acre estate is known for its diverse terroir, with gravelly alluvial soil layered over sandstone. The vineyard is divided into 20 micro-blocks and fermented to create complex, estate-grown Cabernet Sauvignon and Bordeaux-style blends.