The recipe circling around the internet for the lumber is WW lvl. 101: wind crystal, Bundling twine, and jacaranda log X 3 = jacaranda lumber X 1, HQ1- X 6, HQ2- X 9, HQ3- X 12. There is probably a recipe w/o bundling twine that has lower HQ numbers. However, as far as I can tell, no recipe has been found using the lumber yet. Either we haven't found it, or it doesn't exist. We can only hope the recipes are added in the next update because we can't be certain of the value of this item until we do.