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Gonçalo Alves

Astronium fraxinifolium

Also known as: Tigerwood, Jobillo, Muiracatiara

Technical Spec Sheet

2026-07-14

Gonçalo Alves wood grain

Reference grain swatch

Janka Hardness
2,170 lbf (9,653 N)
Avg. Dried Weight
905 kg/m³ (56 lb/ft³)
Specific Gravity
0.85
Type
Hardwood
Grain
Usually interlocked or wavy, giving it a characteristic figure.
Texture
Fine to medium, uniform texture.
Durability
Very durable; excellent resistance to rot and insect attack.
Region
South America
Sustainability
Sustainable — Not listed in the CITES Appendices or on the IUCN Red List of Threatened Species.

Overview

Gonçalo Alves is a stunning tropical hardwood primarily known for its dramatic appearance and exceptional durability. Often marketed as Tigerwood due to its bold, dark striping against an orange-brown background, it is a premier choice for high-end flooring, fine furniture, and decorative veneers. Its remarkable strength and natural resistance to decay make it suitable for both interior and exterior applications.

The wood is exceptionally dense and heavy, with a Janka hardness rating of approximately 2,170 lbf. Its heartwood displays a vibrant range of colors from golden-brown to deep reddish-orange, accented by irregular black streaks. The grain is typically interlocked or wavy, contributing to its striking visual appeal while also making the surface naturally oily and lustrous.

Workshop Notes

Blunting Effect

Moderate to high; high density and mineral content can dull cutting edges quickly.

Gluing

Difficult; natural oils require surface preparation with a solvent like acetone before bonding.

Finishing

Excellent; takes a high natural polish and works well with most oil or lacquer finishes.

Steam Bending

Poor; the wood is too dense and brittle for significant steam bending applications.

Scent

No characteristic odor when being worked.

Assessment

Strengths

  • Extremely durable
  • Striking visual appearance
  • High density
  • Naturally oily and water-resistant

Weaknesses

  • Difficult to glue
  • Can be hard to machine
  • Dries slowly with potential for checking

Common Uses

Flooring · Fine furniture · Veneer · Archery bows · Pool cues · Knife handles · Exterior decking