On the Occurrence of Turquoise in Cornwall

Sir Arthur Russell

With a chemical analysis by E. A. Vincent Ph.D., A.R.I.C., F.G.S.

Mineralogical Magazine; September 1952 v. 29; no. 218; p. 909-912; DOI: 10.1180/minmag.1952.029.218.01
© 1952, The Mineralogical Society
Mineralogical Society (www.minersoc.org)