Black Locust
Robinia pseudoacacia · Hardwood
AI-generated identification · may be incorrect- Type
- Hardwood
- Origin
- Native to the eastern United States, but widely naturalized throughout North America, Europe, and Asia.
- Hardness
- 1,700 lbf (Extremely Hard)
- Durability
- Very Durable (exceptional resistance to decay, rot, and insect attack)
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Grain Pattern
Straight to irregular grain with a coarse, uneven texture. The growth rings are distinct, typical of ring-porous hardwoods.
Color & Appearance
Heartwood ranges from a greenish-yellow to dark brown, often darkening considerably upon exposure to light and air. Sapwood is a pale yellowish-white and is typically very narrow.
Hardness (Janka)
1,700 lbf (Extremely Hard)
Durability & Decay Resistance
Very Durable (exceptional resistance to decay, rot, and insect attack)
Value & Age
Moderate, typically ranging from $3.00 to $6.00 per board foot for domestic rough-sawn lumber.
AI estimate for general guidance only — not a professional appraisal. Actual value depends on grade, dimensions, condition, and local market demand.
- Wood Age Estimate
- The provided image displays the living foliage of the tree rather than a finished lumber sample, making a wood age estimate inapplicable.
Common Uses
Fence posts, decking, boat building, exterior furniture, landscaping ties, mining timbers, and turned items.
Geographic Origin
Native to the eastern United States, but widely naturalized throughout North America, Europe, and Asia.
Workability
Difficult to work with hand and machine tools due to its extreme hardness and density. It rapidly dulls cutting edges, but it glues and finishes surprisingly well.
Finish Recommendations
Takes penetrating oils, varnishes, and modern clear finishes well; prep sanding is important due to coarse texture.
Notable Features
Contains natural extractives that make it exceptionally rot-resistant without chemical treatment; wood dust can be a mild irritant.
