About the Authors

Joana B. Meyer

joana.meyer82@gmail.com (JBM); gemlab@ssef.ch (LEC)

Affiliations Department of Environmental System Science, Swiss Federal Institute of Technology, Zurich, Switzerland, Swiss Gemmological Institute SSEF, Basel, Switzerland

Laurent E. Cartier

joana.meyer82@gmail.com (JBM); gemlab@ssef.ch (LEC)

Affiliations Swiss Gemmological Institute SSEF, Basel, Switzerland, Department of Environmental Sciences, University of Basel, Basel, Switzerland

Eric A. Pinto-Figueroa

Affiliation Department of Ecology and Evolution, University of Lausanne, Lausanne, Switzerland

Michael S. Krzemnicki

Affiliation Swiss Gemmological Institute SSEF, Basel, Switzerland

Henry A. Hänni

Affiliation GemExpert, Basel, Switzerland

Bruce A. McDonald

Affiliation Department of Environmental System Science, Swiss Federal Institute of Technology, Zurich, Switzerland

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: JBM LEC EPF MSK BAM. Performed the experiments: JBM. Analyzed the data: JBM LEC MSK BAM. Contributed reagents/materials/analysis tools: JBM LEC EPF MSK HAH BAM. Wrote the paper: JBM LEC MSK BAM.