Washington (and Montana), on the other hand, do a decent job of chipseal, using small, often rounded, gravel. The ride isn't quite as smooth as well paved fresh asphalt, but it's usually quite tolerable. Much better than asphalt over old concrete, for example.
This is not true in Kittitas County in Central Washington where I live. Here, they will take roads that are in good shape and ruin then with chip seal that uses sharp pieces of basalt. When you ride into it, you can watch your speedometer immediately drop 1-2 mph. Also, they use so little oil that the sharp rocks fly all over the place and when they do stay put the sharp points stick way up.