We picked up some fresh eggs at a local farm in the Bay Area, I'm not sure they're allowed to sell to the public so we won't implicate them. This is a recycled egg crate. Among the brown and white eggs there was a single blue one (pictured, bottom left). When I asked about it, they said it was from an Araucana hen and that we were lucky because they hadn't been laying for a few months but had squeezed a few out in the last couple of days.
Notice how blue and pointy it is!