this tree is not cork oak but is of chinese origin. first brought here in ~1910 to the havard arnold arboretum, boston. it has since then become one of the more common street trees in nyc. the tree has a very thick cork like bark and tan in color. the wood, without cutting it,appears blonde color straight and open grained, similiar to locust wood. in searching www i have not found any info about the wood as a lumber. huh