Allchar deposit (alternative spellings Alsar deposit, Alšar deposit or Alshar deposit) is a low-temperature hydrothermal gold–arsenic–antimony–thallium deposit in southern Macedonia. For some time, the thallium-rich part of the deposit was mined. The Crven Dol mine yielded thallium and the ore body still holds estimated amount of 500 t of thallium. The mineral lorandite from this ore deposit is being used to determine the solar neutrino flux.