Thermally and optically stimulated processes in additively colored beryllium oxide (BeO) single crystals have been investigated. Thermally (TL) and optically stimulated luminescence (OSL) curves were measured. The comparison of TL and OSL properties of the initial and anion-defective BeO monocrystals was made. Additive coloration changes the properties of BeO monocrystals fundamentally. After additive coloration of initial BeO crystal the shape of its glow curves were simplified. The glow curve shape of anion-defective BeO crystals consist practically of monopeak with a satellite peak on its low-temperature branch, in contrast to the glow curve shape of initial crystals, which consist of several peaks. The above mentioned feature of the additively colored BeO simplifies the process of information reading from such crystals. The satellite peak on glow curve of the anion-defective BeO crystals can be bleached. Furthermore, main dosimetric peak during the satellite bleaching does not change. We suggest that further researches in this field could be interesting for the cases of using detectors, based on BeO monocrystals. Comparisons of some radiation-optical properties of anion-defective crystals of BeO with α - Al2 O3 crystals were made. The similar characteristic of TL processes in these crystals was found: reduction of the main peak's TL output and the shifting of the main peak temperature by the increase of heating rate. © 2008 Elsevier Ltd. All rights reserved.