Sixth planet from the Sun in the Arum Galaxy.
Alm is different from the other rocky planets in the Arum Galaxy in that it experiences plate tectonics, which are the cause of its mountains, volcanoes, and almquakes. The movement of the massive plates is caused by the convection of the mantle beneath them; that convection is driven by the planet's internal heat. Plate tectonics can be thought of as a giant recycling mechanism for Alm’s crust. Without this mechanism, the Three Falls would have been much harder for the planet to absorb.
Alm is also unique in that no other known planet currently has the proper temperature and atmospheric pressure to maintain liquid water on its surface. Water may be the single most important criteria for life as it has developed on Alm. Although water is not a major component by percent, it is a very important part of Alm's atmosphere. Alm's surface water and atmosphere are linked to form a single system. The atmosphere and water working together form a general category of rocks on Alm that is not known to exist on any neighboring planets. On Alm's surface, sedimentary rocks are very common. Studies of Alm’s nearest neighbors indicate that volcanic rock is the basic building block of planetary crust and the most common rock type on the surface of the other rocky planets.
For these reasons and more, Alm is unique, a beautiful living gem.