Gneiss

Gneiss is a popular ore type because it holds significant volumes of three heavily used minerals, increasing its utility value. It has a quite a bit of mexallon as well as some pyerite and isogen. Available in 0.4 to -1.0 security status solar systems.

Gneiss offers an efficient Mexallon and Isogen return for its volume, making it a favourite for pilots who have to haul their yield a long way home.