Grey Gum
Scientific name: Eucalyptus punctata
Overview
Grey Gum is a dense Australian eucalyptus species valued for structural strength, durability, and exterior performance. Native to eastern Australia, it is commonly used in heavy construction, decking, and outdoor applications.
It is similar in density to Sydney Blue Gum but typically exhibits a slightly darker and more muted brown coloration. Within the Oceania cluster, Grey Gum represents a high-density structural eucalyptus with strong exterior durability.
Quick Facts
- Common Name: Grey Gum
- Scientific Name: Eucalyptus punctata
- Region: Oceania & Pacific Hardwoods (Eastern Australia)
- Tree Size: 100–150 ft tall, 3–5 ft trunk diameter
- Average Dried Weight: 62 lbs/ft³ (995 kg/m³)
- Janka Hardness: 2,000 lbf
- Color: Pale brown to grayish brown, sometimes with reddish tones
- Grain: Interlocked
- Texture: Medium to coarse
Identification Characteristics
Grey Gum is identified by its brown to medium-brown coloration and moderately coarse texture. The grain is often straight but may display interlocking typical of eucalyptus species.
It lacks the deep red tone of Jarrah and the pink cast of Sydney Blue Gum. Compared to Blackbutt, Grey Gum is typically darker and denser.
Key identification traits include:
- Brown to medium-brown tone
- Medium to coarse texture
- Straight to interlocked grain
- Heavy weight
- Strong structural appearance
Working Properties
Grey Gum is dense and durable but workable with proper tooling.
- Moderate to high tool wear
- Carbide tooling recommended
- Pre-drilling recommended for fasteners
- Sands and finishes well
Proper drying improves stability and reduces movement.
Safety Note
Wood dust may cause irritation in sensitive individuals. Use respiratory protection during machining.
Common Uses
Grey Gum common uses including:
- Decking
- Structural beams
- Exterior construction
- Flooring
- Cladding
- Heavy-duty applications
Sustainability & Notes
Spotted Gum – A closely related Australian hardwood widely used in flooring and structural applications, typically more uniform in color and slightly easier to machine.
Tallowwood – A durable hardwood valued for its resistance to moisture and use in decking and exterior construction, generally lighter in color than grey gum.
Red Ironbark – A very dense hardwood known for its exceptional strength and durability, often heavier and harder than grey gum.
Related Guides
How to Identify Exotic Hardwood by Grain Pattern
Studying grain texture and color variation helps distinguish eucalyptus hardwoods used in construction and flooring.
Density & Hardness Explained (Janka Scale Guide)
Understanding hardness ratings helps explain the durability and strength of hardwood species.
Drying & Acclimating Exotic Woods
Proper drying and acclimation help maintain stability and reduce movement in hardwood lumber used in structural and flooring applications.
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
Grey Gum provides high-density structural representation within an Australian hardwood collection. Its medium-brown tone offers contrast between lighter species like Mountain Ash and darker species like Ironbark. Flat-sawn samples best demonstrate its grain structure. Thin labeled blocks are recommended due to its density.
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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:
• Gorilla All Purpose Wood Filler, Natural Finish (16 oz) for filling cracks, holes, gouges, and imperfections before sanding, staining, or painting woodworking projects
https://amzn.to/3R3eCCg
• DEWALT DPG82 Concealer Anti-Fog Safety Goggles for protecting your eyes from sawdust, wood chips, and flying debris during cutting, sanding, and routing
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• WORKPRO Folding Roller Stand with Adjustable Height for supporting long boards, plywood, and lumber during table saw, miter saw, and woodworking operations
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