Robert R. Coenraads and Claudio Canut de Bon, March 1, 2000
Lapis lazuli has been mined from the Coquimbo Region of Chile since 1905.
Jean Wyart, Pierre Bariand, December 1, 1981
lapis-lazuli is an ornamental stone (figure 1) that has been found in the artefacts of some of the oldest known civilisations.
