Take this with a grain of salt. Supposedly this was datamined from the 3.8.1G PTU patch:
We can see it is an asteroid. It will probably require the Mole with a special mining head. Unoriginal name though.New Mining rock and material
New Q-Type asteroid coming along soon alongside "Quantanium" being a mineable material. Before you ask, yes CIG named their Quantum fuel "Quantanium".
hud_mining_asteroid_name_4=Asteroid (Q-Type)
hud_mining_rock_name_9=Quantanium Deposit