Koa
Acacia koa · Exotic/Tropical Hardwood
- Type
- Exotic/Tropical Hardwood
- Origin
- Endemic to the Hawaiian Islands, USA.
- Hardness
- 1,110 lbf (Medium)
- Durability
- Durable to Very Durable regarding decay resistance, though susceptible to insect attack.
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Grain Pattern
Wavy and interlocked grain with significant curl figure and chatoyance; features a distinct cathedral pattern when turned as a bowl.
Color & Appearance
Medium golden to reddish-brown heartwood with darker brown streaks. Sapwood is yellowish-white. Shows high luster and often darkens slightly with age.
Hardness (Janka)
1,110 lbf (Medium)
Durability & Decay Resistance
Durable to Very Durable regarding decay resistance, though susceptible to insect attack.
Value & Sustainability
- Estimated Market Value
- $50.00 to $150.00 per board foot depending on the degree of curl figure.
- Wood Age Estimate
- Recently crafted (within 5-10 years) based on the high-gloss finish clarity and lack of significant oxidation or surface wear.
- Sustainability Status
- Not listed in CITES Appendices or the IUCN Red List, but highly regulated by the state of Hawaii; availability is limited to dead or fallen trees and specific harvest permits.
Common Uses
Musical instruments (especially ukuleles and guitars), high-end furniture, turned bowls, cabinetry, and veneers.
Geographic Origin
Endemic to the Hawaiian Islands, USA.
Workability
Generally easy to work, though figured sections with interlocked grain can cause tearout during planing or turning. Glues and finishes well.
Finish Recommendations
High-gloss lacquer or polyurethane is commonly used to enhance the depth of the figure; natural oils or waxes can be used for a more organic feel.
Notable Features
Famous for its unique chatoyance (shimmer) and resonance in acoustic instruments. It is one of the most expensive and sought-after domestic woods in the USA.
