Spalted Maple
Acer saccharum • Hardwood
Grain Pattern
Generally straight with irregular spalt lines (black zone lines caused by fungi) and possible wavy or curly figure near the knots.
Color Description
Creamy white to light reddish-brown background with distinct black or dark brown streaks and zones of decay; low to medium luster.
Hardness Rating
1,450 lbf (Hard)
Durability Rating
Non-durable; very susceptible to decay and insect attack, as the spalting process itself is a form of early-stage fungal decay.
Common Uses
Turning (pens, bowls), musical instruments, veneer, inlay work, and decorative furniture accents.
Geographic Origin
Northeastern North America.
Market Value & Sustainability
Estimated Market Value
$15.00 - $30.00 per board foot for high-figure spalted pieces.
Wood Age Estimate
Modern processing; the sample appears to be a recently turned pen blank with fresh lacquer or CA finish.
Sustainability Status
Sustainable; not CITES listed or on the IUCN Red List; widely available with FSC certification.
Workability
Fair to poor; spalted areas are softer and prone to 'punky' texture, requiring sharp tools or stabilizing resins to prevented tearout.
Notable Features
Distinctive black 'zone lines' created by competing fungi; dust can be an allergen or respiratory irritant due to fungal spores.
Finish Recommendations
Cyanoacrylate (CA) glue finish is common for pens to stabilize soft spots; otherwise, lacquer or clear film finishes to highlight contrast.
Identification Confidence
High; the characteristic black zone lines and creamy background color on a small turned object are diagnostic of spalted maple.