Fumed Quartered Curly Eucalyptus — A Masterpiece of Nature and Science: The fuming process (using ammonia vapor) reacts with the wood's natural tannins, permanently enriching the color to a deep chocolate brown while enhancing UV stabi Grain: The phenomenon called chatoyancy produces in Figured Eucalyptus because the wood fibers grew in a wavy, undulating pattern rather than a straight line. When the log is quarter-sawn, you are essentially looking at the "hills and valleys" of those waves in cross-section. These characteristics distinguish Fumed Quartered Curly Eucalyptus from similar species in the veneer market.