Prophets tell of the mystical nature endowed in Luminous Kernite. To the rest of us, it's an average looking ore that has 5% more yield than normal Kernite and can make you rich if you mine it 24/7 and live to be very old.
Kernite is a fairly common ore type that yields the largest amount of mexallon of any ore types in the universe. Besides mexallon the Kernite also has a bit of tritanium and isogen. 400 units of ore are needed for refining.