I study the crystal structures and chemistry of minerals formed under varying conditions in order to answer questions in Environmental Mineralogy, Biomineralization, and Gem Science. My current focus is on bio- and geo-formed carbonates (aragonite, calcite) and amorphous silica (opal, glass).
Farfan, Gabriela A., Apprill, Amy, Cohen, Anne, DeCarlo, Thomas M., Post, Jeffrey E., Waller, Rhian G., and Hansel, Colleen M. 2021. "Crystallographic and chemical signatures in coral skeletal aragonite." Coral Reefs, New York; NY: Springer. https://doi.org/10.1007/s00338-021-02198-4.
Farfan, Gabriela A., Rakovan, John, Ackerson, Michael R., Andrews, Benjamin J., and Post, Jeffrey E. 2021. "The origin of trapiche-like inclusion patterns in quartz from Inner Mongolia, China." American Mineralogist, 1797–1808. 106, (11), Chantilly; Virginia: The Mineralogical Society of America. https://doi.org/10.2138/am-2021-7454.