Crystal images from JAMES SOWERBY (1757 - 1822). British Mineralogy: or Coloured Figures intended to elucidate the Mineralogy of Great Britain. London: Printed by R. Taylor (volume 5 by Arding & Merrett) and sold by the Author, J. Sowerby, and by White, (1802-) 1804-1817.

crystal images from Sowerby