CIBJO. 2012. The Blue Book – The Gemmological Laboratory Book (A Guide for the Management and Technical Operations of Gemmological Laboratories). CIBJO Standard. Laboratory Commission 2012-1. 22p.
CIBJO. 2015. The Blue Book – The Gemstone Book. CIBJO Standard. Coloured Stone Commission 2015-1. 73p.
GÜBELIN, E. J. & KOIVULA, J. I. Photoatlas of Inclusions In Gemstones. 4ª Edição, OpinioVerlag Basel, Volume1, 2004.
GÜBELIN, E. J. & KOIVULA, J. I. Photoatlas of Inclusions In Gemstones. 1ª Edição, OpinioVerlag Basel, Volume 2, 2005.
GÜBELIN, E. J. & KOIVULA, J. I. Photoatlas of Inclusions In Gemstones. 1ª Edição, OpinioVerlag Basel, Volume 3, 2009.