Alphabetical Listing for E

• Eaton-Magaña S, Ardon T, Smit KV, Breeding CM, Shigley JE (2018) Natural-color pink, purple, red, and brown diamonds: band of many colors. Gems & Gemology 54, 352–377.
  
• Eaton-Magaña S, Breeding CM, Shigley JE (2018) Natural-color or blue, gray, and violet diamonds: Allure of the deep. Gems & Gemology 54, 112-131.
  
• Eaton-Magana S, Ardon T, Breeding CM, Shigley JF (2020) Natural-color D-to-Z diamonds: A crystal-clear perspective. Gems & Gemology 56, 318–335,
  
• Eaton-Magaña S, Johnson P (2022) Treated Orange and Pnk CVD Labratory-Grown Diamond. Gems and Gemology 58, 356-358.
  
• Edgar A, Vance ER (1977) Electron Paramagnetic resonance, optical absorption, and magnetic circular dichroism studies of the CO3- molecular-ion in irradiated natural beryl. Phys Chem Minerals 1:165-178
• Ediriweera RN, Perera SI (1989) Heat treatment of Geuda stones - spectral investigation. J Gemmology 21:403-404
• Eftimie ELA, Avram CN, Brik MG, Chernyshev VA, Avram NM (2019) Ab initio analysis of the optical spectra and EPR parameters of Ni2+ ions in CaF2 and CdF2 crystals. Journal of Eftimie ELA
  
• Egan WG, Hilgeman TW (1979) Optical Properties of Inhomogeneous Materials. Academic Press, New York.
• Eggleton RA, Ashley PM (1989) Norrishite, a new manganese mica, K(Mn23+Li)Si4O12 from the Hoskins mine, New South Wales, Australia. Amer Mineral 74:1360-1367
• Eigenmann K, Günthard H (1972) Valence states, redox reactions and biparticle formation of Fe and Ti doped sapphire. Chem Phys Letters 13:58-61
• Eigenmann K, Kurtz K , Günthard HH (1972) The optical spectrum of alpha-Al2O3:Fe3+. Chem Phys Letters 13:58-61
• Eigenmann K, Kurtz K , Günthard HH (1972) Solid state reactions and defects in doped Verneuil sapphire.  III.  Systems iron-​doped sapphire, titanium-​doped sapphire, and iron, titanium-​doped sapphire. Helvetica Physica Acta 45, 453-81.
  
• Elmaleh E, Schmide ST, Karampelas S, Link K, Kiefert L, Süssenberger A, Paul A (2019) U-Pb ages of zircon inclusions in sapphires from Ratnapura and Balangoda (Sri Lanka) and Implications for geographic origin. Gems & Gemology 5, 18-28.
  
• Emeline AV, Sheremetyeva NV, Khomchenko NV, Ryabchuk VK, Serpoine N (2007) Photoinduced Formation of Defects and Nitrogen Stabilization of Color Centers in N-Doped Titanium Dioxide. Journal of Physics Chem C, 111, 11456-11462.
  
• Emelyanova EN, Grum-Grzhimailo SV, Boksha ON, Varina TM. (1965) Artificial beryls containing V, Mn, Co, and Ni. Kristallografiya 10, 59-62. (in Russian)
  
• Emmett JL, Scarratt K, McClure SF, Moses T, Douthit TR, Hughes R, Novak S, Shigley JE, Wang W, Bordelon O, Kane RE (2003) Beryllium diffusion of ruby and sapphire. Gems & Gemology 39, 84–135.
  
• Emmett JL, Dubinsky EV, Hughes RW, Scarratt K (2017) Color, spectra & luminescence. In RW Hughes, Ed., Ruby & Sapphire: A Gemologist’s Guide. Bangkok, 107–163.
  
• Emmett JL, Stone-Sundberg J, Guan Y, Sun Z (2017b) The role of silicon in the color of gem corundum. Gems & Gemology 53, 42–47.
  
• Eromenko GK (1971) Color and pleochroism in minerals of the lazulite groups. (in Russian) Dopovidi Akademii Nauk Ukrains'koi RSR, Seriya B: Geologiya, Geofizika, Khimiya ta Biologiya (1971), 33(6), 490-4
• Eremenko GK (1971) Optical absorption spectra of axinite group minerals. Dopovidi Akademii Nauk Ukrains'koi RSR, Seriya B: Geologiya, Geofizika, Khimiya ta Biologiya, 33, 783-8 (in Ukrainian).
• Ertl A, Hughes JM, Prowatke S, Rossman GR, London D, Fritz EA (2003) Mn-rich tourmaline from Austria: structure, chemistry, optical spectra, and relations to synthetic solid solutions. Amer Mineral 88:1369-1376
• Ertl A, Rossman GR, Hughes HM, Ma C, Brandstätter F (2008) V3+-bearing, Mg-rich strongly disordered olenite from a graphite deposit near Amstall, Lower Austria: A structural, chemical and spectroscopic investigation. Neues Jb Mineral 184, 243-253.
• Evdokimova OA, Belokoneva EL, Artemenko VV, Dubovskaya VM, Urusov VS (1989) Location of impurity cations in synthetic cobalt- and copper-containing beryls according to precisional x-ray structural analysis, EPR and optical spectroscopy data. Kristallografiya 34, 723-30. (in Russian)