Spalted Maple (likely Sugar or Silver Maple)
Acer saccharum or Acer saccharinum • Hardwood
Grain Pattern
Highly irregular and spalted. The sample shows prominent "zone lines" which are dark, winding fungal boundaries. The underlying grain is typically straight but obscured by decay and burl-like textures in this raw state.
Color Description
Pale creamy white to light tan base. Features dramatic black, dark brown, and grey spalting lines. The sapwood is light, while the heartwood (if present) would be darker reddish-brown. The bark is dark grey and deeply furrowed.
Hardness Rating
700-1450 lbf (Soft to Hard). Spalting significantly reduces hardness, often leaving "punky" or soft areas due to fungal decay.
Durability Rating
Non-durable; susceptible to rot (which is the source of the spalting) and insect attack if not dried and treated.
Common Uses
Turning blanks, bowl making, decorative veneers, high-end furniture accents, knife handles, and musical instrument components (electric guitar tops).
Geographic Origin
Northeastern North America and the Great Lakes region.
Market Value & Sustainability
Estimated Market Value
$5.00 - $15.00 per board foot depending on the intensity of the spalting figure and wood stability.
Wood Age Estimate
The raw log/blank appears to be from a tree at least 40-60 years old based on bark thickness, with the spalting indicating it has been felled or dead for 1-3 years.
Sustainability Status
Least Concern (IUCN). Generally sustainable, though specific FSC certified sources vary. Spalting is a natural occurrence and not a result of over-harvesting.
Workability
Challenging due to density variations. Punky (soft) areas can tear out easily during turning or planing. Requires very sharp tools and often benefits from stabilizers (CA glue or resin) to harden soft spots.
Notable Features
Distinctive black zone lines caused by fungi. When worked, it may produce a faint sweet scent, but the dust can be a respiratory irritant due to the fungal spores.
Finish Recommendations
High-gloss finishes like film-forming lacquers or stabilized resins best highlight the chatoyance and spalting lines. Penetrating oils are also common but may soak unevenly into soft areas.
Identification Confidence
High; the black zone lines against a pale hardwood backdrop combined with the specific furrowed bark texture is characteristic of Acer species in a state of decay (Spalted Maple).