Cave of Swords, Naica Mine, Mexico
Entrance to Naica Mine crystal caves
Spanish geologist Juan Manuel Garcia-Ruiz
Cave of Crystals, Naica Mine, Mexico
Selenite crystal from Cave of Crystals
Golden selenite
Selenite mineral sample
Selenite swallow-tail crystals
Selenite crystals
Gypsum crystal group
Selenite crystals on a dried lake bed
Selenite crystal on a dried lake bed
Silver wire, mine specimen
Quartz crystal cluster
Selenite crystals, Winnipeg, Canada
Selenite mineral, light micrograph
Chemical crystals, polarised LM
Chrysocolla
Selenite, Mexico
Gypsum crystal variety
Gypsum variety Sand Selenite
Manganosite
Gypsum, Variety Selenite, Utah
Gypsum rock
Rosette-shaped gypsum known as a desert rose
Acicular form of gypsum
Selenite gypsum
Tufa rock formation
White Sands National Monument, USA
Cave crystals
Zebraite
Galenite cubes
Copper mine mill, Arizona, USA
Galena
Cave curtain formation
Gypsum crystals
Outback quarry, Australia
Desert Rose (Selenite) Crystal Gemstone
Selenite
Rock Types
Diamond miners, South Africa
Opencast coal mine
View of a sample of selenite, a form of gypsum
Volcanic crater lake with sulphur deposits
Men carrying mined sulphur from volcanic crater
Banded iron formation
Malachite, SEM
Malachite
Sapphire mining, Madagascar
Malachite in host rock
Azurite in host rock
Azurite
Azurite and malachite
Mineral exploration drilling, Kenya
Diamond drill bit
Mining core samples, Kenya
Mining core sample, Kenya
Venetia Diamond Mine, South Africa
Diamond processing, Siberia, Russia
Sulphur rocks
Sulphur deposits, Mount Iwo, Japan
Rock concretions and minerals
Covelline
Sand and gravel mine, aerial photograph
Quarry, aerial photograph
Gypsum and sulphur crystals
Bladed radial form of desert rose gypsum
Lechuguilla Cave Crystals
Fibrous antlerite
Microcrystalline antlerite
Borax
Copper mine, Arizona, USA
Open-cast copper mine, New Mexico, USA
Phosphorite
Siderite and calcite
Red calcite, Mexico
Red calcite crystals
Desert locust, on white gypsum
Volcanic solfatara formation
Diamond mine slag heaps
Diamond mine, Siberia, Russia
Sodium chloride rock salt & pictogram
Sodium chloride rock salt on watch glass.
Folded rock strata
Galena & sphalerite on quartz substrate
Quartz with Galena & sphalerit
Sphalerite on strontianite
Bauxite
Diamond mining, Angola
Gold panning, 1940s
Evaporation ponds at potash mine, Utah, USA
Track patterns in evaporation pond at potash mine, Utah, USA
Fossil Cystoid
Oil Shale specimen
Copper Ore
Siderite, and iron ore
Brochantite
Slate mining
Taconite processing plant, USA
Botryoidal hematite
Gypsum, polarised LM in thin section
Sufco Coal Mine, Salina, Utah, USA
Pinto Valley Copper Mine, Arizona, USA, aerial photograph