Safflorite is a rare cobalt arsenide mineral 2. Pure safflorite would be just CoAs2, but iron is virtually always present. Safflorite is a member of the three-way substitution series of arsenides known as the loellingite or loellingite group. More than fifty percent iron makes the mineral loellingite whereas more than fifty percent nickel. A parallel series of antimonide minerals exist.
Safflorite along with the other minerals crystallize in the orthorhombic system forming opaque gray to white massive to radiating forms, Clinosafflorite has a monoclinic symmetry. It has a mohs hardness of 6.9 to 7.3. Twinning is common and star shaped twins are frequently found.
It was first described in 1835 from the Schneeberg District, Erzgebirge. Safflorite occurs with other arsenide minerals as an accessory in silver districts. It alters to the arsenate erythrite in the secondary environment.