C. J. Duffin, "The pharmaceutical use of Lapis Lazuli in the Ancient East" in Pharmaceutical Historian vol. 44 (2014) pp. 84–87
G. Frison, G. Brun, "Lapis lazuli, lazurite, ultramarine ‘blue’, and the colour term ‘azure’ up to the 13th century" bin J. Int. Col. Assoc. vol. 16 (2016) pp. 41–55