The carriers of magnetic properties of rocks were studied using: (1) fully automated measurements of magnetic susceptibility (κ) change of sample influenced by temperature in the range of -196 to 700 °C, (2) reflected light microscopy, (3) electron microprobe analysis, (4) Mössbauer spectroscopy, (5) X-ray powder diffraction analysis. The carriers of magnetic properties of the neogene volcanics have been grouped into seven dominant groups (B, C, D, F, G, I, J) on the basis of the results of method (1) for about 670 individual samples. Groups B–F contain titanomagnetites (Tms) of two magnetic phases of different Curie temperatures (T_C1 ,T_C2); Groups B, C: first phase (T_C1 ≈ 130–220 °C) contains quasi homogeneous or partly oxidized Tms of composition Fe_2.35Ti_0.65O₄-Fe_2.5Ti_0.5O₄, second phase (T_C2 ≈ 570–575 °C) contains oxidized Tms of unknown composition. Groups D, F: both magnetic phases correspond to oxidized Tms of unknown composition. Group D — dominant phase of T_C1 ≈ 480 °C and second magnetic phase of T_C2 ≈ 590 °C. Group F contains oxidized Tms, a first magnetic phase of T_C1 ≈ 420 °C and T_C1 ≈ 530 °C, and a second one of T_C2 ≈ 600 °C, TC2 ≈ 590–600 °C. magnetic phases of T_C ≤ 585 °C also contain small portion of hematite-ilmenites. Group G contains one magnetic phase of T_C ≈ 580 °C (and Verwey transition temperature of T_V ≈ -153 °C), which corresponds tu pure multidomian magnetite. Group I contains two magnetic phases, a first phase of T_C1 ≈ 560–600 °C corresponds to nonstoichiometric magnetite (exceptionally an oxidized TM can be present), and a second phase of T_C2 ≈ 600–630 °C corresponding to hematite-ilmenites. The J group contains only one phase of T_C ≈ 610–640 °C. This magnetic phase corresponds to hematite-ilmenites. The magnetic phases of TC ≈ 585–640 °C correspond to hematite-ilmenites, probably of composition within the range x ≈ 0.09–0.04 (of equation Fe_2-xTi_xO₃). Dominant occurrences of the groups B–J have been delineated in the geological schemes.