@article{lameiras_nunes_vasconcelos_2009, title={Infrared and chemical characterization of natural amethysts and prasiolites colored by irradiation}, volume={12}, ISSN={1516-1439}, url={https://doi.org/10.1590/S1516-14392009000300011}, DOI={10.1590/S1516-14392009000300011}, number={3}, journal={Materials Research}, publisher={ABM, ABC, ABPol}, author={Lameiras, Fernando Soares and Nunes, Eduardo Henrique Martins and Vasconcelos, Wander Luiz}, year={2009}, month={July}, pages={315–320} }