Koa is undoubtedly one of the most beautiful tropical hardwoods. It is a moderately heavy wood; stable, and works well with oils, varnish or lacquer as it takes on an exceptionally rich, deeply reflective glow. Koa was known as the Hawaiian Mahogany and used extensively by the upper class and government buildings for furniture, staircases, and other woodworks.   Click on this link to read the full article on Koa wood .