Goncalo Alves also known as Tigerwood has a heartwood that is typically a medium reddish brown with irregularly spaced streaks of dark brown to black. Color tends to darken with age. Its grain can be straight but is usually wavy or interlocked. Fine, uniform texture with good natural luster.   Goncalo Alves has excellent weathering properties and is rated as exceptionally durable regarding decay resistance. Goncalo Alves is generally not too difficult to work, despite its high density. Figured pieces with irregular grain can pose a challenge in planning and machining operations. Goncalo Alves can also have a moderate blunting effect on cutters. The wood is very resistant to moisture absorption, which can make it difficult to glue but it turns and finishes well. Often used in pistol and knife grips.