The first thing I think of when I hear concrete is something that is heavy. This isn’t the case with “Luna”, a concrete skin for Apple’s iPhone 5. The design team Realize teamed up with Posh Craft to create this cool skin that resembles the surface of the Moon. Each case will have its own unique craters as they’re cut from a single sheet of concrete. The “Luna” skin is available through Post Craft’s online store but is currently sold out. Check back for a restock in the near future.