Brochantite, Cu4(SO4)(OH)6
Locality: Democratic Republic of Congo (Zaïre)
“The Colorado River’s Horseshoe Bend.”
Photograph by Raul Touzon
Schneiderhöhnite, Fe2+Fe3+3[As5O13], and Karibibite, Fe2As4O9
Locality: Morocco
Geological time: Early Cretaceous
Fossils found in England, northern Spain and Portugal
Rutile, TiO2, and Hematite, Fe2O3
Locality: France
“Mauna Ulu erupting in the Kilauea Crater at Mauna Loa.”
Photograph by Robert Madden
Cuprite, Cu2O
Locality: Arizona, USA
“A helicopter surveys the face of the Hubbard Glacier.”
Photograph by Chris Johns
Epidote, Ca2Al2Fe3+SiO4Si2O7O(OH)
Locality: Azerbaijan
Geological time: Late Triassic
Discovered in Brazil
Turquoise, Cu(Al,Fe3+)6(PO4)4 (OH)8. 4H2O, and Quartz, SiO2
Locality: Minas Gerais, Brazil
Inside the cave
Bus di Tacoi cave (year 1978)
Locality: Italy
Synchysite-(Ce), Ca(Ce,La)[F|(CO3)2]
Locality: Italy
Image of ash particles erupted by Redoubt volcano. Pavel Izbekov, Jill Shipman.
(via bromine)
Lava falls