Heartwood is a cream or yellowish brown, with darker brown or black contrasting streaks. Color tends to deepen with age. Olive is sometimes figured with curly or wavy grain, burl, or wild grain. Grain may be straight, interlocked, or wild. Fine uniform texture with moderate natural luster. High-end furniture, veneer, turned objects, and small specialty wood items. Olive trees are commercially important throughout the natural regions where they grow. There are several subspecies and hundreds of cultivars of Olea europaea; the olives harvested from the trees are made into olive oil. The mechanical data and density readings shown above are an average between Olea europaea and O. capensis. Olivewood (Olea spp.) is sometimes confused with Russian Olive (Elaeagnus angustifolia), though it bears little relation to true Olive and is in an entirely different family of trees. Technically, Olive is a part of the Oleaceæ family and is more closely related to Ash (Fraxinus spp.) and Lilac (Syringa vulgaris).