Slavonian Oak (Quercus robur) is European Oak from Slavonia, a region of eastern Croatia whose slow-grown forests produce some of Europe's finest oak. It's rarely seen in the US.It's best known for wine barrels, where its tight grain is said to mellow the taste and texture of the wine, and it's a long-time favorite of Italian winemakers. The heartwood is light to medium brown, sometimes with a greenish hue. The grain is mostly straight, sometimes interlocked or irregular, and the texture coarse.Quartersawn boards show dramatic ray fleck and are the most stable. It's tough and durable, steam-bends well, and is easy to work, gluing, staining and finishing well. Like all oaks, it can stain dark when in contact with iron.Besides barrels, it's used for fine furniture, cabinetry, flooring, boatbuilding and veneer, and its renown in the wine trade dates back centuries. See also White Oak and Bog Oak, the same species preserved in a peat bog.

White Oak (Quercus alba) has long been one of America's preeminent hardwoods. It grows across the central and eastern US, and the trees can live for hundreds of years. One in New Jersey is estimated to be over 600 years old.The heartwood ranges from light golden tan to light and medium brown. The grain is straight, and quartersawn boards show the ray fleck oak is famous for. Its pores are plugged with growths called tyloses, which make it watertight, so it's the classic wood for whiskey and wine barrels.It's the most durable of the oaks and steam-bends well, which is why it has been used in boatbuilding for centuries. Despite its coarse texture, it works, glues, stains and finishes very well. It shrinks a lot, so quartersawn stock gives the most stable results. Like all oaks, it can stain when in contact with iron.White Oak is used for furniture, Mission and Arts and Crafts pieces, cabinetry, flooring, boats, barrels and veneer. For a more affordable oak, see Red Oak.