Philip Krieger

American mineralogist

American mineralogist

American chemist and mineralogist, curator of minerals, Smithsonian Institution

Professor of mineralogy, University of Michigan at Ann Arbor

American mineralogist

American mineralogist, University of Michigan, Ann Arbor, Michigan

American mineralogist

Russian mineralogist

American mineralogist

American mineralogist

American mineralogist

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 and chemist, U. S. National Museum, Washington, D.C.