A relatively rare secondary mineral,
botryogen occurs as thin, orange-yellow crusts up to several square centimeters in area in the Andrassy III section, associated with epsomite, melanterite and copiapite (Szakall et al., 1997).
Very tiny rosettes of bladed pale-orange
botryogen crystals have been found (Fig.
Among them were colorful (but unfortunately unstable) iron sulfates such as voltaite, coquimbite,
botryogen and others from the abandoned subterranean workings in the area of the Alfred pit, Riotinto mine, Riotinto, Huelva.
On level 33 it is extremely common in octahedral crystals to 3 mm on halotrichite, pink coquimbite, red
botryogen, blue chalcanthite, brown jarosite, yellow copiapite and many other complex sulfates .