Gottlobite, CaMg(VO4,AsO4)(OH), is a mineral in the adelite group found as isolated crystals or isometric grains of orange or orange-brown color.

It was first observed at the site of a long-abandoned mine on the northern slope of Gottlob hill in Friedrichroda, Thuringia, Germany by Jὒrgen Graf in August of 1996.

EDX revealed the presence and quantities of elements present in the mineral, including Ca, V, As, O and small amounts of Sr.

This was then measured in terms of oxides, where the weight percents were 24.98 for CaO, 0.92 for SrO, 17.54 for MgO, 1.50 for MnO, 1.44 for CuO, 27.47 for V2O5, 20.32 for As2O5, and 5.4 for H2O.

Mg is in gottlobite's chemical formula, but was not found in the EDX testing because of very similar pattern of arsenic lines that were overlapping with magnesium.