gsminmag Mineralogical Magazine Mineralogical Magazine 0026-461X Mineralogical Society 10.1180/minmag.1977.041.317.09 Plumbian Tennantite from Sark, Channel Islands Bishop A. C. Criddle A. J. Clark A. M. Dept. of Mineralogy, British Museum (Natural History), Cromwell Road, London SW7 5BD 3 1977 41 317 59 63 8 4 1976 12 5 1976 Copyright © 1977, The Mineralogical Society 1977 Summary

An unusual tennantite, containing 4·64% Pb, has been found on a mineral specimen from Sark's Hope Mine collected in 1843. An electron-probe analysis is given, together with visible spectrum reflectance data, quantitative colour values, VHN, and cell dimensions determined from X-ray powder diffraction photographs.