| Calcite | Co2+ | Rossman (1988) |
| Cu2+ | Guse (1982) | |
| blue | Calderon et al. (1983) | |
| Sergeev et al. (1974) | ||
| Sterzel and Chorinsky (1968) | ||
| green | Hassan (1978) | |
| rose | Raju (1977) | |
| Sergeev et al. (1976) | ||
| Kapitonov and Sergeev (1974) | ||
| Bershov et al. (1968) | ||
| violet | Serveev et al (1976) | |
| yellow | Skropyshev and Kas'yanenko (1978) | |
| Sergeev and Dorfman (1975) | ||
| Serveev et al.(1974) | ||
| Kozlovskii et al. (1969) | ||
| Samoilovich and Lushnikov (1969) | ||
| Cancrinite | SO3- | Novozhilov et al. (1966) |
| Carpholite | Fe2+ | Weiser et al. (1996) |
| Cavansite | VO22+ | Rossman (1999) |
| Cassiterite | Sn | Cohen et al. (1985) |
| Nb, Fe | Peng et al. (1985) | |
| Fe | Calas and Cottrant (1982) | |
| Celesite | radiation centers | Bernstein (1979) |
| Chalcanthite | Cu2+ | Lakshman and Reddy (1973b) |
| Charoite | Rossman (1999) | |
| Chlorite | Fe | Bakhtin (1986) |
| Smith (1977) | ||
| Smith and Strens (1976) | ||
| White and Keester (1966) | ||
| Mn3+ | Hålenius (1984) | |
| clinochlore | Cr3+ | Platonov et al. (1996) |
| Calas et al. (1984) | ||
| Calas et al. (1984) | ||
| Chloritoid | Fe, IVCT, Mn2+ | Hälenius et al. (1981) |
| Bakhtin (1979) | ||
| Fe, IVCT | Faye et al. (1968) | |
| Chromite | Cr3+, Fe2+ | Mao and Bell (1974b) |
| Chrysoberyl | Cr3+ | Pinheiro et al. (2000) |
| Liu et al. (1995) | ||
| Schmetzer et al (1980) | ||
| Hassan and El-Rakhaway (1974) | ||
| Farrell and Newnham (1965) | ||
| Gübelin and Schmetzer (1980) | ||
| Fe3+ | Farrell and Newnham (1965) | |
| Clinochlore | Cr3+ | Platonov et al. (1996) |
| Calas et al. (1984) | ||
| Clinohumite | Fe-Ti IVCT | Langer et al. (2002) |
| Clinozoisite | Mn3+ | Langer et al. (2003) |
| Taran et al. (1984) | ||
| Clintonite | Fe, Ti | Manning (1969) |
| Coalingite | Fe3+ | Mattson and Rossman (1984) |
| Cobaltite | Co2+ | Ravikumar et al (1998) |
| Condrodite | Fe-Ti IVCT | Langer et al. (2002) |
| Copiapite | Fe3+ | Rossman (1975) |
| Coquimbite | Fe3+ | Rossman (1975) |
| Cordierite | Fe2+, Fe3+, IVCT | Khomenko et al. (2001) |
| Vance and Price (1984) | ||
| Bakhtin (1980) | ||
| Goldman et al. (1977) | ||
| Smith (1977) | ||
| Smith and Strens (1976) | ||
| Sengupta D (1975) | ||
| Faye (1972) | ||
| Faye et al. (1968) | ||
| Robbins and Strens (1968) | ||
| Farrell and Newnham (1967) | ||
| sekaninite | Fe2+ | Goldman et al. (1977) |
| Cornetite | Cu2+ | Ramanaiah et al (1996) |
| Smith and Strens (1976) | ||
| Corundum | ||
| sapphire | Cr2+, Cr3+, Ti3+, Fe3+ | Fontana et al. (2008) |
| Fe2+, Fe3+, Ti4+ | Pisutha-Arnold et al. (2004) | |
| Kiefert et al. (1996) | ||
| Milisenda and Henn (1996) | ||
| Krzemnicki et al. (1996) | ||
| Ruan et al. (1996) | ||
| Hänni (1994) | ||
| Liu et al. (1992) | ||
| Ediriweera and Perera (1989) | ||
| Schmetzer (1987) | ||
| Burns (1985) | ||
| Burns and Burns (1984) | ||
| Burns and Burns (1981) | ||
| Schmetzer and Bank (1981) | ||
| Schmetzer and Bank (1980) | ||
| Nikolskaya et al. (1978) | ||
| Smith (1977) | ||
| Smith and Strens (1976) | ||
| Smith (1978b) | ||
| Eigenmann and Günthard (1972) | ||
| Eigenmann et al. (1972) | ||
| Ferguson and Fielding (1972) | ||
| Ferguson and Fielding (1971) | ||
| Krebs and Maisch (1971) | ||
| Lehmann (1971) | ||
| Faye (1971a) | ||
| Lehmann and Harder (1970) | ||
| Tippen (1970) | ||
| Townsend (1968) | ||
| Fe3+, Cr3+, V3+ | Schmetzer et al. (1983) | |
| Schmetzer et al. (1982) | ||
| Schmetzer et al. (1980) | ||
| Rumyantsev et al. (1971) | ||
| Ti3+ | Burns and Burns (1981) | |
| Townsend (1968) | ||
| V3+ | White et al. (1967) | |
| McClure (1962) | ||
| ruby | Cr3+ | Langer et al. (1997) |
| Taran et al. (1994) | ||
| Kane (1983) | ||
| Bosshart (1982) | ||
| Schmetzer and Bank (1981) | ||
| McClure (1963) | ||
| Cr in minerals | review | Neuhaus and Richartz (1958) |
| Crocoite | CrO42- | Abu-Eid (1976) |
| Cummingtonite | Fe2+ | Burns (1970a) |