Black Acacia
Scientific name: Acacia mearnsii
Overview
Black Acacia, commonly known as Black Wattle, is a fast-growing hardwood native to southeastern Australia and Tasmania. The species is best known for its tannin-rich bark, which has been widely used in the leather tanning industry for more than a century. In addition to its industrial importance, Black Acacia produces a useful hardwood valued for furniture, flooring, interior woodworking, and specialty applications.
The wood typically ranges from golden brown to reddish brown and features a fine, even texture with generally straight grain. Although it is often overshadowed by more famous Australian hardwoods such as Australian Blackwood, Black Acacia remains an important plantation timber and a practical choice for a variety of woodworking projects.
Quick Facts
- Common Name: Black Acacia
- Scientific Name: Acacia mearnsii
- Region: Oceania & Pacific Hardwoods (Australia)
- Tree Size: 30–65 ft tall, 1–2 ft trunk diameter
- Average Dried Weight: 40 lbs/ft³ (640 kg/m³)
- Janka Hardness: 1,160 lbf
- Color: Golden brown to reddish brown
- Grain: Straight to slightly interlocked
- Texture: Fine and even
Identification Characteristics
Black Acacia is recognized by its warm brown coloration, fine texture, and relatively uniform appearance. The heartwood ranges from golden brown to medium reddish brown and may darken slightly with age. Grain is usually straight, though occasional boards may exhibit mild interlocking.
The wood has a moderate natural luster and develops a smooth, attractive surface when properly finished.
Key identification traits include:
- Golden brown to reddish-brown heartwood
- Fine, even texture
- Straight to slightly interlocked grain
- Moderate density and weight
- Smooth finished appearance
- Subtle natural luster
Working Properties
Black Acacia is generally considered easy to work with both hand and machine tools. It machines cleanly, sands well, and accepts most finishes without difficulty. Interlocked grain can occasionally cause minor tear-out, but sharp tooling typically resolves the issue.
- Machines well with sharp tools
- Turns cleanly and holds detail well
- Glues satisfactorily
- Sands to a smooth finish
- Accepts stains and finishes readily
- May cause moderate tool wear
- Safety Note
Safety Note
Wood dust from Black Acacia may cause skin, eye, or respiratory irritation in sensitive individuals. Appropriate dust collection and personal protective equipment should be used when machining or sanding.
Common Uses
Black Acacia is commonly used for:
- Furniture
- Cabinetry
- Flooring
- Interior trim
- Millwork
- Veneer
- Turned objects
- Tool handles
- Fence posts
- General utility timber
Sustainability & Notes
Black Acacia is widely planted throughout Australia, Africa, South America, and parts of Asia. Because it grows quickly and adapts well to plantation management, it is generally considered a sustainable hardwood resource when responsibly harvested.
In some regions outside its native range, Black Acacia has become naturalized and may be considered invasive, making management practices important for maintaining ecological balance.
Comparative Notes & Related Species
Australian Blackwood – A more decorative Acacia species with richer color, greater figure, and stronger demand for fine furniture and musical instruments.
Gidgee – A significantly denser Australian Acacia known for its exceptional hardness and dark coloration.
Mulga – Another Australian Acacia valued for its density, durability, and use in specialty woodworking applications.
Related Guides
Understanding Wood Strength: What Makes Wood Strong?
Explains how density, hardness, and stiffness contribute to overall wood performance.
Density & Hardness Explained (Janka Scale Guide)
Provides context for comparing Black Acacia to other hardwood species.
Best Woods for Furniture Making
Examines the characteristics that make certain hardwoods desirable for furniture construction.
Compare Wood Properties
See how this species ranks in density and hardness using our Wood Density & Janka Hardness Chart. You can also explore Hardest Woods, Softest Woods, and Most Dense Woods for quick comparisons.
Collector Notes
Black Acacia is an important species within the Australian Acacia group and provides an excellent comparison specimen for collectors interested in Oceania hardwoods. While not as highly figured as Australian Blackwood or as dense as Gidgee, it represents one of the most commercially significant Acacia species grown worldwide.
Collectors often seek samples that display strong reddish-brown coloration, clean grain, and a well-finished surface.
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Do you have lumber, wood samples, tree photographs, woodworking projects, furniture, carvings, turnings, musical instruments, or other items made from this species?
Exotic Woods of the World welcomes photographs from woodworkers, collectors, sawyers, researchers, and wood enthusiasts around the world. Selected submissions may be featured on this page and throughout our website to help document and showcase real-world examples of this species.
When submitting photos, please include the common name, scientific name (if known), a brief description, and any information you would like us to share with the image.
Wood Sample Collection
This species is part of an ongoing effort to document and preserve wood samples from around the world.
Learn more about contributing to the collection:
Resources
Authoritative botanical and forestry references used in compiling information about this species include:
• USDA Forest Service – Wood Handbook: Wood as an Engineering Material
https://www.fpl.fs.usda.gov/products/publications/
• The Wood Database – Global reference for wood identification, physical properties, and woodworking characteristics
https://www.wood-database.com/
• Royal Botanic Gardens, Kew – Plants of the World Online – Botanical taxonomy and species distribution database
https://powo.science.kew.org/
• International Union for Conservation of Nature (IUCN Red List) – Global conservation status assessments
https://www.iucnredlist.org/
• Convention on International Trade in Endangered Species (CITES) – International trade regulations for protected plant species
https://cites.org/
Additional forestry publications, academic research papers, and regional timber studies may also be referenced where available.
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Availability & Where to Buy
Exotic hardwood availability can vary significantly depending on region, sustainability regulations, and supplier inventory.
As this archive grows, recommended suppliers and specialty wood retailers will be listed here to help woodworkers locate responsibly sourced material.
Lumber Suppliers:
Availability varies — see the Where to Buy Exotic Woods page for current sources.
Related Tools & Products:
• Small Woodworking Projects (Best of Fine Woodworking) for building boxes, stools, shop accessories, and other practical weekend woodworking projects
https://amzn.to/4vA2kk3
• 80-Piece Threaded Insert Nuts and Furniture Screw Set for creating strong, reusable threaded connections in woodworking, furniture building, and shop projects
https://amzn.to/3SmACIO
• Power Tool Organizer with Charging Station for organizing cordless drills, batteries, chargers, and other power tools while keeping your workshop neat and efficient
https://amzn.to/4oU2XST
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