Silky Oak
Scientific name: Grevillea robusta
Overview
Silky Oak is one of Australia’s most visually distinctive native hardwoods. Despite its common name, it is not a true oak but belongs to the Proteaceae family. It is highly valued for its striking medullary ray pattern, which produces a lace-like or flecked figure, especially when quartersawn.
The wood ranges from golden brown to reddish-brown and develops a strong chatoyance when finished. While moderately durable, Silky Oak is primarily used for decorative interior applications rather than structural work.
Quick Facts
- Common Name: Silky Oak
- Scientific Name: Grevillea robusta
- Region: Oceania & Pacific Hardwoods (Australia)
- Tree Size: 60–100 ft tall, 2–3 ft trunk diameter
- Average Dried Weight: 36 lbs/ft³ (580 kg/m³)
- Janka Hardness: 1,130 lbf
- Color: Golden brown to reddish brown with prominent ray fleck
- Grain: Interlocked
- Texture: Medium to coarse
Identification Characteristics
Silky Oak is best identified by its prominent medullary rays, which create a lace-like figure, particularly in quartersawn material. The ray fleck can resemble true oak but is often more dramatic and decorative.
The grain is generally straight, and the texture is medium. When finished, the wood exhibits a strong natural luster and depth.
Key identification traits include:
- Lace-like ray figure
- Golden to reddish tone
- Medium density
- Decorative quartersawn appearance
- Moderate weight
Working Properties
Silky Oak is generally easy to work compared to other Australian hardwoods.
- Machines and sands well
- Glues effectively
- Takes stain and finish beautifully
- Stable in interior environments
Because of its ray figure, tear-out may occur in interlocked grain areas if tools are dull.
Safety Note
Dust may cause irritation in sensitive individuals. Standard protective measures are recommended during machining.
Common Uses
Silky Oak common uses including:
- Cabinetry
- Veneer
- Furniture
- Interior paneling
- Decorative joinery
- Musical instrument components
Sustainability & Notes
Silky Oak is widely cultivated and available from plantation sources in addition to native forests. It remains one of the more commercially accessible Australian decorative hardwoods.
Comparative Notes & Related Species
Queensland Silky Oak – A closely related species with similar lace-like grain patterns, commonly used in furniture and decorative veneers.
Australian Blackwood – A durable Australian hardwood used in furniture and cabinetry, typically darker and more uniform in grain than silky oak.
Tasmanian Myrtle – A fine-textured hardwood used in furniture and interior woodworking, generally more uniform in appearance compared to silky oak.
Related Guides
Wood Strength
Learn what determines wood strength, including density, stiffness, and resistance to bending and impact.
Density & Hardness Explained (Janka Scale Guide)
With a moderate hardness rating, Silky Oak contrasts clearly against the heavier Australian structural species.
Building a Documented Wood Collection
Ray-figure species benefit from both flatsawn and quartersawn samples.
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
Silky Oak is highly desirable in a documented wood collection due to its distinctive ray figure. Quartersawn samples best showcase the lace-like medullary rays, while flatsawn material demonstrates its overall color and grain structure. Multiple cuts may better represent the species’ full character range. Because of its moderate density, sample blocks are lighter than many other Australian hardwoods.
Video Overview
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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.
Lumber Suppliers:
Availability varies — see the Where to Buy Exotic Woods page for current sources.
Related Tools & Products:
• Diablo Fine Finish Saw Blade with 60 Hi-ATB Teeth for ultra-smooth and precise woodworking cuts
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• Mirka Abranet Sanding Mesh Discs Assorted Grit Pack for dust-free sanding and fine surface finishing
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• Tried & True Danish Oil Finish for enhancing wood grain and protecting woodworking projects with a natural finish
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