Crandallite
(Ca,REE)Al3 (PO4 )(PO3 OH)(OH)6 , CaAl3 (PO4 )(PO3 OH)(OH)6
Plumbogummite (group) , Minerals containing OH , Minerals containing PO4
—
Open
Crandallite from Kovdor, Kola Peninsula, Russia
Photo by Kaethe17 (via Wikimedia Commons), CC-BY-SA 4.0
2
0
0
—
Mineral, Orthophosphate , Phosphate , Hydroxide
Creedite
Ca3 Al2 (SO4 )(OH)2 F8 ·2H2 O
Minerals containing H2O , Minerals containing OH , Minerals containing SO4
—
Open
Creedite specimen from Akchatau, Shet District, Karaganda, Kazakhstan
Photo by Chip Clark, via Smithsonian National Museum of Natural History
0
5
0
PL, PL/XL
Hydroxide , Mineral, Sulphate , Hydrated , Halide
Cristobalite
SiO2
Silica
—
Open
Cristobalite on obsidian from Canyon Butte, Siskiyou County, California, USA
Rob Lavinsky, iRocks.com – CC-BY-SA-3.0
2
4
0
CL, CL/OM, PL/XL, Unknown
Mineral, Simple oxide
Crocoite
PbCrO4
Minerals containing Cr[VI]O4
—
Open
Image of specimen 'M 27029 Crocoite' (Museums Victoria) from Dundas, West Coast Region, Tasmania, Australia
Photo by Benjamin Healley, Copyright Museums Victoria / CC BY (Licensed as Attribution 4.0 International)
0
1
0
PL
Mineral
Cryolite
Na3 AlF6
—
—
Open
Cryolite specimen from the Ivigtut Cryolite deposit, Ivittuut, Arsuk Firth, Arsuk, Kitaa Province, Greenland. Size: 8.8 x 6.7 x 5 cm
Photo by Didier Descouens (via Wikimedia Commons), CC-BY-SA-3.0
0
5
0
IR, PL
Mineral, Halide
Cryolithionite
Na3 Al2 (LiF4 )3
—
—
Open
White massive cryolithionite from Ivigtut, Ivittuut, Arsuk Fjord, Sermersooq, Greenland.
Photo by David Hospital (via Wikimedia Commons), CC-BY-SA 4.0
0
1
0
PL/XL
Mineral, Halide
Cummingtonite
☐{Mg,FeII }2 {Mg,FeII }5 Si8 O22 (OH)2 , ☐Mg2 Mg5 Si8 O22 (OH)2
Mg-Fe-Mn amphibole , Minerals containing OH , Cummingtonite-Grunerite (series)
—
Open
Brownish-colored sprays of cummingtonite needles, from near West Chesterfield, western Hampshire County, western Massachusetts, USA
(C) 2017 James St. John (via Wikimedia Commons). CC-BY-2.0
1
2
0
Reflectance
Hydroxide , Mineral, Silicate
Cummingtonite-Grunerite (series)
◻{Mg2 }{Mg5 }(Si8 O22 )(OH)2 — ◻{FeII 2 }{FeII 5 }(Si8 O22 )(OH)2
Mg-Fe-Mn amphibole
Cummingtonite , Grunerite , Cummingtonite (var. Fe2+)
0
8
0
Reflectance
Hydroxide , Silicate , Series
Cuprite
Cu2 O
—
—
Open
Specimen of cuprite, from Poteryaevskoe mine, Rubtsovskoe Cu-Pb-Zn deposit, North-western Altay, Russian Federation. Specimen M 51563, Museums Victoria.
Photo by Benjamin Healley, Copyright Museums Victoria / CC BY (Licensed as Attribution 4.0 International)
7
0
0
—
Mineral, Simple oxide
Curite
Pb3 (H2 O)2 [(UO2 )4 O4 (OH)3 ]2
Minerals containing H2O , Minerals containing OH
—
Open
Curite from Katanga, DR Congo, exhibited at the Mineralogical Museum, Bonn, Germany
Photo by Elke Wetzig, CC-BY-SA
0
4
0
PL
Hydroxide , Mineral, Uranyl , Hydrated
Cyclosilicate
[Sin O3n ]2n -
—
Eudialyte (group)
0
1
2
Reflectance
Group