Optical Spectra of Zircon

• Richman I, Kisliuk P, Wong EY (1967) Absorption spectrum of U⁴⁺ in zircon (ZrSiO₄). Phys Rev 155:262-267

• Demiray T, Nath DK, Hummel F (1970) Zircon-vanadium blue pigment. J Amer Ceramic Soc 53:1-4
• Fielding PE (1970) The distribution of uranium, rare earths, and color centers in a crystal of natural zircon. Amer Mineral 55. 428-440.
• Vance ER, Anderson BW (1972) Metamict Ceylon zircons. Mineralogical Magazine 38, 605-13.
• Fedorovskikh YA, Shul'gin BV, Emel'chenko GA, Gavrilov FF, Ilyukhin VV (1973)  Crystal structure and optical spectra of zircon. Izvestiya Akademii Nauk SSSR, Neorganicheskie Materialy 9, 432-4. In Russian
• Bakhtin AI (1974) Optical absorption spectra of natural zircons. Magn. Opt. Spektrosk. Miner. Gorn. Porod (1974), 91-8. In Russian       
• Vance ER (1974) The anomalous optical absorption spectrum of low zircon. Mineral Mag 39:709-714.
• Vance ER, Mackey DJ (1974) Optical study or U⁵⁺ in zircon. J Phys C: Solid State Phys 7:1898-1908
•  Fedorovskikh YA, Krasnobaev AA, Polezhaev YM (1975) Spectroscopic study of rare earth ions in zircon.  v sb., Spektroskopiya Kristallov (1975), 279-80. In Russian
• Vance ER, Mackey DJ (1975) Further studies of the optical absorption spectrum of U⁵⁺ in zircon. J Phys C, Solid State Phys 8:3439-3447
• Vance ER, Mackey DJ (1978) Optical spectra of U⁴⁺ and U⁵⁺ in zircon, hafnon, and thorite. Phys Rev B 18:185-189.
• Taran MN (1979) Study of the nature of the coloring of jewelry-​grade zircons. Vopr. Geokhimii, Mineral., Petrol. i Rudoobraz., Kiev (1979), 50-6. In Russian

• Di Gregorio S, Greenblatt M, Pifer JH, Sturge MD (1982) An ESR and optical study of vanadium(4+) ion in zircon-​type crystals. Journal of Chemical Physics 76, 2931-7.
• Bernardiono T (1985) Identification of rare earth minerals. Rivista Mineralogica Italiana (1985), (2), 84-87.
• Hong X, Bai G, Zhao M (1985) The study of the optical and the EPR spectra of vanadium(4+) in zircon-​type crystals. Journal of Physics and Chemistry of Solids 46, 719-20.
• Kvasnitsa VN, Taran MN, Smirnov GI, Legkova GV, Vuiko VI (1988) Violet-​red zircon from kimberlite. Mineralogicheskii Sbornik (Lvov) 42, 12-17. In Russian.

• Taran MN, Bagmut NN, Kislyakova TY, Kvasnitsa VN (1990) Spectral characteristics of zircon from mantle-​derived rocks and its prospecting significance. Mineralogicheskii Sbornik (Lvov) 12, 44-51.  

• Niesert A, Hanrath M, Siggel A, Jansen M, Langer K (2002) Theoretical study of the polarized electronic absorption spectra of vanadium-​doped zircon. Journal of Solid State Chemistry 169, 6-12.
• Wu SY, Zheng WC (2002) Investigations of the g factors and hyperfine structure parameters for Er³⁺ ion in zircon-​type compounds. Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy 58, 3179-83.
• Niesert A, Sievers R, Siggel A, Langer K, Jansen Martin (2004) Preparation and optical absorption of zircons, co-​doped with vanadium and rare earth elements. Solid State Sciences 6, 1149-1154.

• Kempe U, Thomas SM, Geipel G, Thamas R, Plötze M, Blöttcher R, Grambole G, Hoentsch J, Trinkler M (2010) Optical absorption, luminescence and electron paramagnetic resonance (EPR) spectroscopy of crystalline to metamict zircon: Evidence for formation of uranyl, manganese and other optically active centers. American Mineralogist 95, 335-347. 
• Klinger M, Kempe U, Pöppl A, Böttcher R, Trinkler M (2012) Paramagnetic hole centres in natural zircon and zircon colouration. European Journal of Mineralogoy 24, 1005-1016.
• Suthiyuth R (2014) Tenebrescent zircon. Gems & Gemology 50, 156-157. 
• Kempe U, Trinkler M, Poeppl A, Himcinschi C (2016) Coloration of natural zircon. Canadian Mineralogist 54, 635-660.
• Zeug M, Nasdala L, Wantanachaisaeng B, Balmer WA, Corfu F, Wildner M (2018) Blue zircon from Ratanakiri, Cambodia. The Journal of Gemmology 36, 112-132.

• Sun Y, Schmitt AK, Hager T, Schneider M, Papalardo L, Russo M (2020) Natural blue zirocn from Vesuvius. Mineralogy and Petrology. https://doi.org/10.1007/s00710-020-00727-7
• Blumentritt F, Fritsch E (2021) Photochromism and Photochromic Gems: A Review and Some New Data (Part 1). The Journal of Gemmology 37,780-800.
• Ogden JM (2021) Green Zircon in Early South-East Asian Jewellery. The Journal of Gemmology 37, 775-777.