Black Walnut (Sapwood and transition)
Juglans nigra • Hardwood
Grain Pattern
Straight to irregular with a prominent cathedral figure resulting from flat-sawing. Note visible pith line and drying check at the top.
Color Description
Predominantly cream to pale tan sapwood with streaks of grey and chocolate brown near the heartwood transition. Dulls slightly and turns yellow-gray over time with UV exposure.
Hardness Rating
1010 lbf (Medium)
Durability Rating
Moderately Durable (Heartwood is durable, but sapwood is susceptible to decay and insect attack)
Common Uses
Furniture, cabinetry, interior trim, paneling, turning blanks, and secondary wood in high-end joinery.
Geographic Origin
Eastern North America
Market Value & Sustainability
Estimated Market Value
$6.00 - $12.00 per board foot (Values vary as sapwood is often considered a defect in Walnut lumber)
Wood Age Estimate
Relatively recent/kiln dried; minimal oxidation or wear, likely milled within the last 1-5 years.
Sustainability Status
Not CITES listed and classified by IUCN as Least Concern. Widely available from sustainable sources.
Workability
Exceptional workability with both hand and machine tools. It planes smoothly, glues well, and takes a high polish. Sapwood is slightly softer than heartwood.
Notable Features
Faint, pleasant, distinct mildly nutty scent when cut. Can cause skin irritation or allergic reactions in sensitive individuals. Low tannin content compared to oak.
Finish Recommendations
Walnut accepts most finishes well; Danish oil or a clear polyurethane is recommended to highlight the natural grain. Staining is often used on sapwood to match heartwood color.
Identification Confidence
High; the pore structure, cathedral grain, and specific transition from pale sapwood to dark heartwood streaks are characteristic of Juglans nigra.