Anhydrous vanadate containing hydroxyl, preisingerite group, and forms a series with preisingerite and with petitjeanite
Specific gravity: 6.9
Streak: Light yellow
Colour: Yellow to yellow-brown
Common impurities: As,P
Schumacherite is a very rare vanadate occurring in the oxidised zone of
At the Wombat Hole prospect, Morass Creek gorge, Benambra, East Gippsland Shire, Victoria, Australia, schumacherite is associated with mrazekite and pucherite (HOM).
At the type locality, the Pucher Shaft, Wolfgang Maaßen mines, Schneeberg, Erzgebirgskreis, Saxony, Germany, schumacherite occurs as crusts on quartz-rich vein specimens (AM 70.438), associated with pucherite, namibite and quartz (HOM).
At the Lodi Number 4 Mine, Adams Peak, Last Chance Mining District, Plumas county, California, USA, schumacherite is associated with bismutite, bismutoferrite, bismutostibiconite, koechlinite and namibite (HOM).
At the Mica Lode-Meyers quarry, Eight Mile Park Pegmatite Mining District, Fremont county, Colorado, USA, schumacherite is associated with beyerite and namibite (HOM).
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