VII.—Note on the Occurrence of Achroite at Rock Hill, in the Parish of St. Austell, Cornwall, and on the Black Tourmaline of the Same Locality

J. H. Collins

Mineralogical Magazine; November 1876 v. 1; no. 2; p. 55-58; DOI: 10.1180/minmag.1876.001.2.08
© 1876, The Mineralogical Society
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