Optical Spectra of Euclase

• Grum-Grzhimailo SV (1958) The color of idiochromatic minerals. Zapiski Vserossiiskogo Mineralogicheskogo Obshchestva 87, 129-50. (in Russian)  
• Bakhtin AI (1973) Optical absorption spectra of eudialyte.  Editor: Vinokurov VM.  Sostav, Strukt. Svoistva Miner.  1973, 14-18.    Kazan. Gos. Univ.,  Kazan, USSR Conference.  In Russian.
• Mattson SM, Rossman GR (1987a) Identifying characteristics of charge transfer transitions in minerals. Phys Chem Minerals 14, 94-99.
• Stocklmayer S (1998) Blue euclase from Zimbabwe. J Gemmology 26, 204-210.
• Guedes KJ, Krambrock K, Pinheiro MVB, Menezes Filho LAD (2006) Natural iron-containing blue and colorless euclase studied by electron paramagnetic resonance. Physics and Chemistry of Minerals 33, 553–557.
• Krambrock K, Guedes KJ,  Pinheiro MVB (2008) Chromium and vanadium impurities in natural green euclase and their relation to the color.  Physics and Chemistry of Minerals 35, 409–415.
• Dias LN, Pinheiro MVB, Krambrock K (2009) Radiation-induced defects in euclase: formation of O^- hole and Ti³⁺ electron centers. Physics and Chemistry of Minerals 36, 519-525.
• Gilles-Guéry L, Galoisy L, Schnellrath J, Baptise B, Calas G (2021) Mn³⁺ and the pink color of gem-quality euclase from Northeast Brazil. American Mineralogist, 107, 489-494. DOI: https://doi.org/10.2138/am-2021-7838.
• Sasaki S, Miura M, Saruwatari K (2021) Pink Euclase. Gems & Gemology 57, 375-376.
• Gilles-Guéry L, de Queiroz LAV, Schnellrath J, Williams B, Williams C, Barbosa TC, Lalurs BM, Galoisy L, Calas G (2022) Pink-Orange Euclase From Bahia, Brazil.The Journal of Gemmology 38, 44-62.