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APA Citation
Megaw, P. K. M., Fritsch, E., Spano, T. L., & Gray, M. (2018). geology and Mineralogy of Electric OpalTM: Green Daylight-Luminescing Hyalite Opal from Zacatecas, Mexico. Rocks and minerals, 93(5), 404–413. http://access.bl.uk/ark:/81055/vdc_100066557038.0x000056