Okan heartwood is yellowish brown, often with a slight green tinge, on exposure darkening to reddish brown with a yellowish or greenish tinge; it is distinctly demarcated from the 5–8 cm thick, pale pink sapwood. The grain is interlocked, texture moderately coarse. The heartwood is very durable. It shows excellent natural resistance to wood decay fungi and is also resistant to dry-wood borer, marine borer and termite attacks. The wood is often slightly striped and lustrous, and has an unpleasant smell when freshly cut.
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