Neodymium (neodytrium)

The jagged mountains were pure blue in the dawn and everywhere birds twittered and the sun when it rose caught the moon in the west so that they lay opposed to each other across the earth, the sun whitehot and the moon a pale replica, as if they were the ends of a common bore beyond whose terminals burned worlds past all reckoning. As the riders came up through the mesquite and pyracantha single file in a light clank of arms and chink of bitrings the sun climbed and the moon set and the horses and the dewsoaked mules commenced to steam in flesh and in shadow.