Grade A teak wood comes from the heartwood, or the center of the tree. The center of the tree is denser and has a higher oil content then the outer part of the tree – the sapwood. Premium outdoor teak furniture made with Grade A teak will appear darker than other teak due to the high oil content. This dark honey brown is one way to identify premium grade A teak furniture. Grades B and C come from outer portions of the tree, is younger and has more sapwood. Atlanta Teak Furniture uses only the best Grade A teak.