Botanical Name: (Astronium fraxinifolium) Goncalo Alves is another one of the dense wildly colored tropical hardwoods. Also known as Tigerwood because of the colors in this species with its orange and black streaks. It is a dense heavy wood with a specific Gravity of .95 Tree is Native To: Guyana, Columbia, Ecuador, Mexico, Peru, Guatemala, Trinidad and Brazil. Goncalo Alves is a wonderful often overlooked tonewood. It has tone very similar to that of Mahogany except it offers clearer highs with warm mids and lows.