Guayacan Real
Scientific name: Guaiacum sanctum
Overview
Guayacan Real, often referred to as true lignum vitae, is one of the densest and hardest woods in the world. Native to Central America and parts of the Caribbean, this species is highly valued for its extreme durability, natural oils, and resistance to wear.
The wood ranges from olive green to dark brown, often deepening with age and exposure. Its fine texture and interlocked grain give it a smooth, almost waxy surface when finished.
Due to its density and self-lubricating properties, Guayacan Real has historically been used in demanding mechanical applications where strength and friction resistance are critical.
Quick Facts
- Common Name: Guayacan Real
- Scientific Name: Guaiacum sanctum
- Region: Central America Hardwoods
- Tree Size: 30–50 ft tall, 1–2 ft trunk diameter
- Average Dried Weight: 75–85 lbs/ft³
- Janka Hardness: 4,500 lbf (approx.)
- Color: Olive green to dark brown, darkens with age
- Grain: Interlocked
- Texture: Fine, very dense, naturally oily
Identification Characteristics
Guayacan Real is immediately recognizable by its exceptional weight and density. Even small pieces feel unusually heavy compared to most hardwoods. The color often shows greenish or olive tones when freshly cut, gradually shifting toward darker brown hues over time.
The grain is typically interlocked, contributing to both its strength and its difficulty to machine cleanly. The fine, tight texture gives the wood a smooth surface, especially when sanded and polished.
Key identification traits include:
- Extremely heavy and dense
- Olive green to dark brown coloration
- Fine, tight texture with natural luster
- Interlocked grain pattern
- Oily feel when handled
Working Properties
Working Guayacan Real can be challenging due to its extreme density and high oil content. Cutting tools dull quickly, and pre-drilling is required for most fastening applications.
The wood turns very well and can achieve a high natural polish without the need for heavy finishing. Gluing can be difficult because of the oils, so proper surface preparation is important.
- Difficult to machine
- Excellent for turning and polishing
- Requires sharp tools and slow feed rates
- Gluing can be challenging due to oil content
- Very stable once dry
Safety Note
Dust from Guayacan Real can cause irritation in some individuals, particularly due to its natural oils and resin content. Proper dust collection and personal protective equipment are recommended during machining and sanding.
Common Uses
Guayacan Real is used in specialized applications where durability and wear resistance are critical.
- Bearings and bushings
- Tool handles
- Turned objects
- Mallets and striking tools
- Marine applications
- Decorative carvings
Sustainability & Notes
Guayacan Real is listed under CITES Appendix II due to overharvesting and habitat loss. Trade is regulated, and sourcing can be limited depending on region and supplier.
Because of its slow growth and high demand, responsibly sourced material is essential when working with this species.
Comparative Notes & Related Species
Lignum Vitae
Closely related and often confused with Guayacan Real, true lignum vitae shares similar density, oil content, and mechanical properties.
Jatoba
Another dense Central American hardwood, Jatoba offers high strength but lacks the oily, self-lubricating characteristics of Guayacan Real.
Ziricote
Ziricote provides a dramatic visual appearance with bold figure, contrasting with the more uniform and functional character of Guayacan Real.
Related Guides
Understanding Wood Strength: What Makes Wood Strong?
Explore how density, grain structure, and internal composition contribute to the extreme durability seen in woods like Guayacan Real.
Understanding CITES & Protected Species
Learn why Guayacan Real is regulated, how international protections work, and what to consider when sourcing restricted hardwoods.
Machining Dense Tropical Hardwoods
Working with extremely dense woods requires proper tools and technique. This guide covers cutting, drilling, and finishing strategies for challenging species.
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
Guayacan Real is a standout species in any wood collection due to its extreme density and unique coloration. Even small samples feel noticeably heavier than most hardwoods, making it a tactile reference piece for comparing weight and hardness.
Over time, the color deepens, giving collectors an opportunity to observe natural aging in dense tropical 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.
Lumber Suppliers:
Availability varies — see the Where to Buy Exotic Woods page for current sources.
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