For example, he made in-depth studies of the mineralogy of the now-famous Brumado mine in Bahia, recovering countless superb crystal specimens of uvite, dolomite, hematite, magnesite and Japan-law twinned quartz, as well as rarities such as chernovite, agardite-(Y), florencite-(Ce), woodhouseite
and svanbergite among many others.
Variation in the composition, including significant substitutions of calcium, phosphorus and vanadium, account for the atypical color; some specimens have historically been misidentified as woodhouseite. The most typical occurrence for the species is as massive, cream-white, finely crystalline veinlets to 5 cm thickness.
Woodhouseite: purplish pink crystalline masses have been shown microchemically to be very impure alunite.