Features related to molecular dimers of selenium Se(2)are observed in the Raman spectra of borosilicate glass doped with Se-rich II-VI nanocrystals as well as in the Raman spectra of decolored (thermally annealed) samples of similar glasses with the semiconductor nanocrystals dissolved. These Raman features exhibit resonant behavior correlated with the Se(2)molecule absorption spectra. The Se(2)dimers are found to be formed at high-temperature (800-1000 degrees C) annealing of the semiconductor-doped borosilicate glasses.