Thermoluminescence (TL) and radioluminescence (RL) wavelength spectra of aragonite have been investigated. Despite the different origin of the samples used, a number of common luminescence features emerges. The spectra for TL peaks appearing near 50, 70 and 170 K are identical with a prominent and broad band centered near 400 nm. In the case of TL peaks appearing at about 350, 380, 420 and 455 K, the onset of new emission bands is due to the characteristic emission of some cation impurities (i.e., Mn2+, Pb2+). Below 200 K, all emission bands encountered for a given TL peak are also present in the RL spectrum obtained at the temperature of the glow peak. The electron-hole recombination mechanisms involved in aragonite appear to be related with those found in rhombohedric carbonates.