English: (a) Sulfide nodule from the central part of the paralava body, on the contact of which karwowskiite was found. Fragment magnified in (b,c) is underlined by frame. (b,c) Differentiated sulfide nodule composed of pentlandite and troillite zones with inclusions of tetrataenite and nickelphosphide. (b)—reflected light, (c)—BSE image; fragments magnified in (d,e) are marked in frames. (d,e) Rare karwowskiite crystals are noted only on the boundary of sulfide nodules and paralava. (d)—reflected light, (e)—BSE image. An = anorthite, Di = diopside, Fap = fluorapatite, Fdmol = ferrodimolybdenite, Krw = karwowskiite, Mol = molybdenite, Nic = nickelphosphide, Pnl = pentlandite, Ttae = tetrataenite, Tro = troilite.