Pyrite and quartz, crystalline
Sphalerite and pyrite
Pyrite on quartz
Quartz and pyrite
Pyrite interspersed with quartz
Pyrite
Iron pyrite
Pyrite crystals
Iron pyrite crystals
Iron pyrite crystal
Cubic pyrite crystals
Pyrite crystals in their host rock
Pyritohedral crystals, close up
Sample of pyrite
Marcasite stepped crystals
Quartz coated with silica
String of pyrite cubes
Cluster of pyrite cubes
Iron pyrite, light micrograph
Pyrite cubes in host rock
Pyrite crystals, Peru, South America
Iron pyrite crystal, SEM
Iron pyrites
Chalcopyrite and quartz crystals
Iridescent pyrite in a clay nodule
Marcasite in chalk groundmass, close-up
Andelusite crystals in slate
Iron pyrite crystals, SEM
Quartz and Pyrite crystals
Pyrite mineral stone
Hydrothermal quartz vein
Crystalline sulphur
Chalcopyrite specimen
Marcasite.
Arsenopyrite crystals
Marcasite mineral
Lapis lazuli crystals
Rhodochrosite and pyrite
Amethyst
Rock concretions and minerals
Sphalerite
Arsenopyrite with siderite and pyrite crystals
Fool's Gold, iron pyrites crystals
Celestine crystals in sulphur groundmass
Glaucodot crystals in groundmass
Octahedral crystals of Pyrite
Orpiment on pyrite
Pyrite, Colorado
Sulphur crystals
Spine crystals in quartz groundmass
Slate with pyrite
Cross-section slice of Brazilian agate
Mass of pyramid-shaped amethyst crystals
Single amethyst crystal, close up
Citrine crystal group
Slate waste
Iron pyrite cubic crystals in matrix, collected at Mina Victoria, Navajun La Rioja, Spain
Lapis lazuli crystals I
Lapis lazuli crystals II
Pyrite crystals.
Calcite bladed crystals
Fluorite crystals
Calcite crystal
Crystals inside dinosaur fossils
Stibnite
Aragonite crystals with sulphur
Tetrahedrite
Cubic perovskite crystals in groundmass
Deformation structure in schist
Jarosite on rock
Pyrite dodecahedrons II
Pyrite dodecahedrons I
Black smoker hydrothermal vents
Arsenopyrite crystals, close-up
Pyrrhotite crystals, close-up
Chalcosite
Covellite, thin section micrograph
Arsenopyrite
Tetrahedrite mineral specimen
Molybdenite in granite groundmass
Bismuthinite crystals in rock groundmass
Gypsum and sulphur crystals
Quartz nodule, polarised light micrograph
Ammonite, pyritized
Pyritized ammonite
Iron pyrites crystals (fool's gold)
Nugget of Fool's Gold, iron pyrites
Realgar with grey quartz
Fluorite crystals on quartz, close up
Calcite crystal rosettes
Pyrite Sun
Pyrite Stalagtite
Ammonite fossil, thin section
Massive carnelian, close up
Dendritic mineralisations in chalcedony
Manganite
Galenite and marcasite
Pyrite with Hematite, Italy
Pyrite crystals, Spain
Banded iron ore
Pyrites preservation of ammonite shell
Crystalline limestone rock
Sample of the mineral pyrite.
Chalcopyrite mineral
Tourmaline unworked stones
Pollution in Trent and Mersey canal, Staffordshire, UK
Pyrolusite in quartz
Galenite in pyrite
Cube-forming galena, close-up
Bornite, close-up
Cinnabar on rock surface, close-up
Cobaltite and chalcopyrite crystals
Lump of yellow sulphur
Sulphur deposits, Volcano Island, Italy
Chalopyllite crystals
Chalocite crystals
Gersdorffite
Volcanic vent, New Zealand
Sulphur crystal
Chalcocite crystals
Cobaltine mineral, cobalt ore
Realgar and orpiment
Quartz filled geode
Geode interior
Galena crystals (galenite)
Bismuthinite
Oxynoticeras ammonite fossil
A fossil crinoid, Pentacrinites fossils
Fossil ammonite
Ammonite fossil
Manganese oxide, dendritic form
Pyrite crystals on Shale
Rock strain fringes, light micrograph
Geode, thin section micrograph
Rhyolitic geode
Slate quarry waste
Botryoidal chalcedony, close-up
Sulphur mineral crystal
Gypsum stone
Childrenite crystal in quartz
Quartz crystals
Turquoise embedded in iron oxide
Franklinitein calcite groundmass
Sapphire crystals in rock groundmass
Elbaite on albite and quartz
Schorl and quartz crystals in groundmass
Quartzite metamorphic rock
Basaltic dyke rock