Baryte is a light blue ore that spawns at 1000m to 2000m below. It is fairly common while mining downwards. Baryte can be found both in caves and on it's own. It is a very fast ore to mine like lower level ores such as sapphire and ruby. At legend rank or lower, it is a good idea to mine this for the 5000 XP.
Baryte is used to upgrade items in your base, mainly your Research & Development. It is also used for mining operation on levels 11-14