Ovangkol is commonly used for back & sides of acoustic guitars, and is very closely related to rosewood, both in looks and tone. It’s a little more sustainable than rosewood. Ovangkol is brown in color and features some black streaking and maybe some subtle flaming figuring. It has a bit more mid-range than rosewood, and the same bass & treble that rosewood is known for. The main difference is look. Tonally rosewood & ovangkol are very similar.