up to now:
mining liquizit we got as rare dyrepriton and stermid
mining Titan we got as rares of H2DT and Dyrepriton

using cargo scanner on someone's field can close to us i saw them mining HDT and they got mostly stermid as sideproduct from what i saw in their fieldcan.

note: i dont have any rare imentium isotope yet (i guess you get it when mining stermonit which we havent done yet.)