Index No: NBM055621; Collected By: ; Sample Type: hand sample; Notes: Alteration suite from SE part, Transvaal Hills, not for geochem. #5562 = alunitized, porous, sheared tuff near base of Tma with euhedral clear alunite crystals coating fracture surface. #5562A = porous, unwelded ash-flow tuff (lower Tma) opalized (and alunitized?) with 1% very fine-grained disseminated hematite grains, probably after pyrite.