From the Illustrating Natural History section:
Das Mineralreich (The Mineral Kingdom)
Reinhard Brauns (1861-1937)
with additions by Leonard J. Spencer
Esslingen a. N.: J. F. Schreiber, 1912
At the end of the 18th century, a growing popular interest in natural
history resulted in an increase of illustrated field guides and collectors'
manuals. Images of plant and mineral specimens, drawn from nature, were
printed for study and comparison. Improvements in color printing allowed
artists, scientists, and publishers to include intricate details.
Images of mineral specimens were accurately drawn and colored to
illustrate Reinhard Brauns’ Das Mineralreich (The Mineral Kingdom). The
plates were issued bound in the book and separately. —Elizabeth Periale