Black Walnut
Juglans nigra • Hardwood
Grain Pattern
Straight grain with visible cathedral patterns and irregular dark streaks typical of a flat-sawn slab. Subtle wavy figure is present along the vertical grain lines.
Color Description
Medium to dark chocolate brown heartwood with light tan sapwood visible near the edges. Features a moderate luster and will develop a golden-brown patina over time with UV exposure.
Hardness Rating
1,010 lbf (Medium)
Durability Rating
Very Durable regarding decay resistance, though susceptible to insect attack (specifically powderpost beetles).
Common Uses
High-end furniture, cabinetry, interior trim, flooring, gunstocks, veneer, and turned objects.
Geographic Origin
Eastern United States and parts of Southern Canada.
Market Value & Sustainability
Estimated Market Value
Approximately $12.00 to $18.00 per board foot for Select/Better grade, though wide slabs can command higher prices.
Wood Age Estimate
The slab appears to be relatively recent stock (1-5 years post-milling) based on the surface oxidation and the remains of chalk mill-marks ('545') indicating recent lumber processing.
Sustainability Status
Not listed on CITES Appendices or the IUCN Red List; widely available and generally considered sustainable in North America, with FSC certification common.
Workability
Excellent. Easy to work with both hand and machine tools. It glues, stains, and finishes very well, though the large pores may require grain filler for a glass-smooth finish.
Notable Features
Distinctive mild, spicy scent when worked. High tannin content. It is a known sensitizer and the dust can cause respiratory irritation or skin rashes in some individuals.
Finish Recommendations
A penetrating oil or oil-based polyurethane is recommended to enhance the natural depth and color of the grain. Shellac works well as a sealer.
Identification Confidence
High. The characteristic chocolate-brown color, pore structure, and chalk mill markings are consistent with commercially processed North American Black Walnut.