Clifford Frondel

American mineralogist

American geochemist and mineralogist, U.S. Geological Survey

Mineralogist, petrologist, geologist

Professor of mineralogy, University of Michigan at Ann Arbor

American mineralogist

Geologist and mineralogist, California Division of Mines and Geology, San Francisco

American mineralogist

Russian mineralogist

American mineralogist

American mineralogist

American university teacher

Russian mineralogist

American, professor of mineralogy, Harvard University, Cambridge, Massachusetts

American mineralogist

Professor of mineralogy, Columbia University, New York NY

American mineralogist

Amateur mineralogist from San Anselmo, California

American mineralogist, professor of geology, Lafayette College, Easton, Pennsylvania

American mineralogist, Academy of Natural Sciences, Philadelphia