@article{rao_2002,  title={Silica enrichment, graphic granite and aquamarine growth: a new exploration guide},  volume={74},  ISSN={0001-3765},  url={https://doi.org/10.1590/S0001-37652002000300014},  DOI={10.1590/S0001-37652002000300014},  number={3},  journal={Anais da Academia Brasileira de Ciências},  publisher={Academia Brasileira de Ciências},  author={RAO, A. BHASKARA},  year={2002},  month={Sep},  pages={533–538} }