SILEX achates. Calcedony or Agate. From Sowerby's British Mineralogy. 1802-1817
SILEX achates. Calcedony or Agate. Location: Churchills, near Lanford, Somersetshire. Plate no. 514. From: Sowerby, James. 1802-1817. British Mineralogy: Or Coloured figures intended to elucidate the mineralogy of Great Britain. Plate from vol: 5. page no. 213.
All the coloured plates from Sowerby's British Mineralogy have been scanned and are available on Geoscenic.
Bob McIntosh
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