Curbaril
Scientific name: Hymenaea oblongifolia
Overview
Curbaril is a tropical hardwood native to northern and western South America. Hymenaea oblongifolia belongs to the Fabaceae family and occurs in humid tropical forests across portions of the Amazon Basin and surrounding regions.
The heartwood generally ranges from golden brown and orange-brown to medium reddish brown, often becoming darker and richer with age and exposure. Sapwood is considerably paler and normally contrasts clearly with the mature heartwood. Grain is generally straight to interlocked, while texture ranges from medium to moderately coarse.
Curbaril produces hard, heavy, strong timber suitable for furniture, flooring, cabinetry, construction, interior joinery, turning, and other demanding woodworking applications. Because several Hymenaea species produce similar timber and can share regional trade names, accurate botanical identification is particularly important.
Quick Facts
- Common Name: Curbaril
- Alternate Common Name(s): Courbaril
- Scientific Name: Hymenaea oblongifolia
- Region: South American Woods
- Tree Size: Approximately 65–100 ft (20–30 m) tall, occasionally larger under favorable forest conditions
- Average Dried Weight: Approximately 50–60 lbs/ft³ (800–960 kg/m³), with natural variation
- Janka Hardness: Reliable standardized species-specific values are not consistently documented
- Grain: Straight to interlocked
- Texture: Medium to moderately coarse
Identification Characteristics
Curbaril generally produces golden-brown, orange-brown, or reddish-brown heartwood. Freshly exposed wood may appear lighter and warmer, while older surfaces can develop deeper red-brown or darker brown coloration.
Sapwood is typically cream to pale yellowish brown and contrasts noticeably with mature heartwood.
Grain is commonly straight but can become interlocked or irregular. Quarter-sawn material may display subtle ribbon-like figure where reversing grain is present.
Key identification traits include:
- Golden to reddish-brown heartwood
- Color typically darkens with age
- Cream to pale yellowish sapwood
- Strong heartwood and sapwood contrast
- Straight to interlocked grain
- Medium to moderately coarse texture
- Moderate natural luster
Working Properties
Curbaril can require moderate effort to machine because of its hardness, density, and potentially interlocked grain.
Sharp cutting tools are recommended. Reversing grain can produce tear-out during planing and routing, while harder material can increase cutting resistance and tool wear.
Once properly surfaced, the wood can sand and polish to an attractive finish.
- Moderate to high cutting resistance
- Sharp tools are recommended
- Interlocked grain can produce tear-out
- Turns well with appropriate tooling
- Sands to a smooth surface
- Accepts clear finishes well
- Pre-drilling is recommended for fasteners
Safety Note
Detailed species-specific information concerning reactions to Curbaril wood dust is limited. Dust generated during machining of dense tropical hardwoods may cause skin, eye, or respiratory irritation.
Effective dust collection, eye protection, and respiratory protection are recommended during sawing, routing, turning, and sanding.
Common Uses
Its hardness, strength, rich coloration, and wear resistance make Curbaril suitable for applications including:
- Furniture
- Flooring
- Cabinetry
- Interior joinery
- Heavy construction
- Architectural millwork
- Wood turning
- Carving
- Decorative woodworking
- Specialty projects
Sustainability & Notes
Curbaril occurs within tropical forests of northern and western South America, including portions of the Amazon Basin. These forests provide critical wildlife habitat, watershed protection, carbon storage, and extraordinary biological diversity.
Responsible sourcing is important whenever timber originates from natural tropical forests. Legal harvesting, traceability, responsible forest management, and maintenance of natural regeneration help reduce the environmental impacts associated with timber production.
Because multiple Hymenaea species may be traded under overlapping regional names, scientific identification and geographic provenance are particularly useful when purchasing or documenting Curbaril.
Comparative Notes & Related Species
Jatoba – A closely related Hymenaea hardwood and one of the best-known members of the genus, widely valued for flooring, furniture, cabinetry, and heavy-duty woodworking.
Jatoba-do-Cerrado – A Hymenaea associated strongly with the Cerrado, providing a useful ecological and botanical comparison with the tropical-forest Curbaril.
Baru – A dense South American Fabaceae hardwood useful for comparing weight, hardness, coloration, and demanding woodworking applications.
Related Guides
Identifying Unknown Wood Samples
Explore how color, grain, texture, density, pores, rays, end grain, geographic origin, and other clues can help identify unfamiliar wood specimens.
Color Changes in Tropical Hardwoods Over Time
Learn why golden, orange, red, purple, and brown tropical woods can change significantly after exposure to oxygen and ultraviolet light.
Best Woods for Knife Handles
Compare woods used for knife handles based on hardness, stability, wear resistance, grain, appearance, and ability to withstand repeated handling.
Moisture Content & Long-Term Stability
Learn how moisture content influences movement, checking, joint performance, dimensional stability, and long-term woodworking results.
Preventing Tear-Out in Interlocked Grain
Explore machining techniques that can produce cleaner surfaces when working with reversing or interlocked grain.
Compare Wood Properties
See how this species ranks in density and hardness using our Wood Density & Janka Hardness Chart. You can also explore Hardest Woods, Softest Woods, and Most Dense Woods for quick comparisons.
Collector Notes
Curbaril is a relatively dense and hard South American hardwood, although standardized physical-property information specifically for Hymenaea oblongifolia is less extensive than for commercially familiar Jatoba.
Values published for other Hymenaea species should not automatically be assigned to Curbaril.
Use the Wood Density & Janka Hardness Chart (Complete Comparison Guide) to compare established physical properties among documented hardwoods.
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When submitting photos, please include the common name, scientific name (if known), a brief description, and any information you would like us to share with the image.
Wood Sample Collection
This species is part of an ongoing effort to document and preserve wood samples from around the world.
Learn more about contributing to the collection:
Resources
Authoritative botanical and forestry references used in compiling information about this species include:
• USDA Forest Service – Wood Handbook: Wood as an Engineering Material
https://www.fpl.fs.usda.gov/products/publications/
• The Wood Database – Global reference for wood identification, physical properties, and woodworking characteristics
https://www.wood-database.com/
• Royal Botanic Gardens, Kew – Plants of the World Online – Botanical taxonomy and species distribution database
https://powo.science.kew.org/
• International Union for Conservation of Nature (IUCN Red List) – Global conservation status assessments
https://www.iucnredlist.org/
• Convention on International Trade in Endangered Species (CITES) – International trade regulations for protected plant species
https://cites.org/
Additional forestry publications, academic research papers, and regional timber studies may also be referenced where available.
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Availability & Where to Buy
Exotic hardwood availability can vary significantly depending on region, sustainability regulations, and supplier inventory.
As this archive grows, recommended suppliers and specialty wood retailers will be listed here to help woodworkers locate responsibly sourced material.
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