Iroko Can Hide Tool-Damaging Minerals Iroko generally machines well, but occasional calcium-carbonate deposits can severely damage cutting edges. These mineral pockets may appear as small pale or chalky areas within the wood and can dull a freshly sharpened tool unexpectedly. Practical takeaway: Inspect Iroko blanks for light mineral deposits, sharpen before the final passes and stop to refresh the edge if cutting resistance suddenly increases. Light cuts reduce tearout after an edge begins losing sharpness.
