I do wonder about this though. First, most residents of this world refer to it as the Azure Sun, so just calling it a sun shouldn't matter too much. Also, due to the gases in the atmosphere you shouldn't see just the rock above you. In my opinion you should be able to see the crystal, but since we are so close to the top of yliakum that the crystal would be rather low in the sky, also if you set the crystal in the sky you would be saying where the crystal is, something that could have bad results.