Jarrah – Eucalyptus marginata
Jarrah Wood Appearance
Colour – The heartwood is dark red in colour. Sapwood is usually pale yellow.
Grain – Moderately coarse textured and even. Wavy interlocking grain produces attractive fiddleback figure in some samples.
Jarrah Wood Properties
Density – 835 kg/m3
Durability – Class 2 – Highly resistant to decay when fully exposed to the weather, clear of the ground and well drained with free air circulation. Resistant to decay when in ground contact.
Hardness – Hard (rated 2 on a 6 class scale) in relation to indentation and ease of working with hand tools.
Jarrah Identification Features
Sapwood – Pale in colour, distinct from heartwood
Heartwood – Dark red to pink red, usually darkens with exposure
Texture – Coarse, uniform texture; grain usually straight but may be interlocked
Jarrah Wood Structure
Growth rings – Mostly absent, but occasionally present as a slight zonate arrangement of thickness fibres.
Vessels – Large to medium in size, numerous and mainly solitary, but occasionally in oblique arrangements. Vessel lines conspicuous. Tyloses frequent. Dark red gum deposits also sometimes present.
Parenchyma – Paratracheal, but not readily visible to the inexperienced observer. Not visible without a lens.
Rays – Fine, numerous, not visible without a lens.
Jarrah Other Features
Burning Splinter Test – A match size splinter burns to charcoal without ash.
Gum Veins – Fairly common.