Black Walnut (Sapwood and Transition Wood)
Juglans nigra • Hardwood
Grain Pattern
Principally straight but displaying cathedral figure and irregular swirls around knots; medium texture with a natural luster.
Color Description
Light yellowish-white sapwood transitioning to a pale grayish-brown; heartwood in this species typically ages to a rich dark brown, while sapwood remains pale or is often darkened via steaming in commercial processing.
Hardness Rating
1,010 lbf (Medium)
Durability Rating
Heartwood is very durable and resistant to decay; sapwood is non-durable and susceptible to insect attack.
Common Uses
High-end furniture, cabinetry, gunstocks, interior paneling, veneer, turned objects, and musical instruments.
Geographic Origin
Eastern North America
Market Value & Sustainability
Estimated Market Value
$8.00 - $15.00 per board foot (Note: sapwood-heavy pieces are generally valued lower than pure heartwood unless used for specific contrast).
Wood Age Estimate
Freshly milled or surfaced; the lack of deep oxidation and the bright appearance of the sapwood suggest the sample was recently cut from the log or newly planed.
Sustainability Status
Not listed in CITES Appendices or on the IUCN Red List; widely available and generally considered sustainable with FSC certification common.
Workability
Excellent workability with both hand and machine tools; glues, stains, and finishes well, though it can occasionally produce tearout on irregular grain sections.
Notable Features
Distinctive mild odor when being worked; contains juglone which can be a mild irritant; known for its exceptional dimensional stability after seasoning.
Finish Recommendations
Penetrating oils or wiping varnishes are highly recommended to highlight the grain contrast; clear polyurethane or lacquer also works well to protect the lighter sapwood tones.
Identification Confidence
High; the transition from creamy sapwood to the characteristic grayish-brown heartwood, combined with the specific pore structure and knot formation, is diagnostic of Juglans nigra.