A Curious Crystal from the Binn Valley, Switzerland1

G. F. Herbert Smith
Assistant in the Mineral Department of the British Museum
1Communicated by permission of the Trustees of the British Museum.

Mineralogical Magazine; May 1920 v. 19; no. 89; p. 40-42; DOI: 10.1180/minmag.1920.019.89.03
© 1920, The Mineralogical Society
Mineralogical Society (www.minersoc.org)