IV.—On Some Artificial Forms of Silica, Illustrative of the Structure of Agates, Chalcedonies, etc.

J. I'Anson and E. A Pankhurst

Mineralogical Magazine; February 1882 v. 5; no. 22; p. 34-40; DOI: 10.1180/minmag.1882.005.22.05
© 1882, The Mineralogical Society
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