The Adirondacks are composed of essentially the same rock as the lunar highlands as well; granted, it's a park, but if we were really desperate for anorthosite (it's a low grade aluminum ore, basically, not nearly as good as bauxite) it would be about a million times cheaper to get it from there than it would be the moon.
And the lunar maria (low dark areas) are basically the same as the huge basalt flows like the Columbia flood basalts or the Deccan Traps or whatever.
But it would be about a million times cheaper to get the anorthosite into space where we want it if we mined it and luanched it from the moon to orbiting construction stations.