Galena
Enargite mineral
Marcasite in chalk groundmass, close-up
Iron pyrite
Iron pyrite crystals
Pyrite crystals
Chalcocite crystals
Arsenopyrite crystals, close-up
Stibnite
Sulphur crystals
Pyrite crystals in their host rock
Tetrahedrite
Cobaltite and chalcopyrite crystals
Glaucodot crystals in groundmass
Bismuthinite crystals in rock groundmass
Pyritohedral crystals, close up
Pyrite interspersed with quartz
Tetrahedrite mineral specimen
Pyrrhotite crystals, close-up
Cinnabar on rock surface, close-up
Lump of yellow sulphur
Iron pyrite crystal
Cubic pyrite crystals
Pyrite
Marcasite stepped crystals
Chalcopyrite and quartz crystals
Aragonite crystals with sulphur
Bornite, close-up
Crystalline sulphur
Sphalerite
Sphalerite and pyrite
Tennantite
Bournonite
Sulphur crystal
Cobaltine mineral, cobalt ore
Molybdenite in granite groundmass
Celestine crystals in sulphur groundmass
Cube-forming galena, close-up
Hydrothermal quartz vein
Chalcopyrite mineral
Calcite on sphalerite
Marcasite.
Arsenopyrite crystals
Chalcosite
Arsenopyrite
Azurite crystals
Citrine
Quartz
Tourmaline
Baryte
Covellite in clay groundmass, close-up
Greenockite on rock surface, close-up
Realgar with grey quartz
Pentlandite, close-up
Andelusite crystals in slate
Lapis lazuli crystals
Amethyst
Iron pyrites
Sample of pyrite
Chalopyllite crystals
Pyromorphite
Mimetite mineral
Plumbogummite mineral
Astrophyllite mineral
Adamite mineral
Picromerite mineral
Cuprite octahedral crystal
Cuprite twinned crystals
Brookite
Quartz in sphalerite
Fluorite crystals
Owly sulphur owlfly
Pyrite mineral stone
Microcline mineral
Galena crystals (galenite)
Blue lace agate
Stibnite crystals
Sphalerite on strontianite
Iron pyrite crystal, SEM
Iron and sulfur reaction
Sulfur
Gypsum and sulphur crystals
Gersdorffite
Chalocite crystals
Monazite mineral
Covellite, thin section micrograph
Calcium carbonate precipitation
Franklinitein calcite groundmass
Atacamite and malachite crystals
Galenite crystals
Nailhead calcite and galena
Sphalerite and ankerite crystals
Calcite bladed crystals
Quartz coated with silica
Fool's Gold, iron pyrites crystals
Apophyllite crystals
Apophyllite on calcite
Crushed diamond, SEM
Axinite
Sulphur being heated
Wulfenite mineral
Belt-hook carved in lapis lazuli
Pyrite crystals, Peru, South America
Chalcopyrite specimen
Realgar and orpiment
Banded iron ore
Volcanic vent, New Zealand
Vanadinite mineral sample
Scapolite mineral sample
Graphite on calcite crystals
Golden selenite
Mining core sample, Kenya
Sulphur rocks
Iron II Sulphide with hazard pictogram
Iron II Sulphide on watch glass
Ruby
Sulphur crystals, light micrograph
Siderite mineral
Tourmaline crystal specimen
Tourmaline crystal specimens
Beryl in rock groundmass, close-up
Rhodonite crystals in rock groundmass
Sapphire crystals in rock groundmass
Bismuthinite
Iridescent pyrite in a clay nodule
Iron pyrite, light micrograph
Marcasite mineral
Sphalerite crystals
Twinned staurolite crystals
Thulite mineral
Berzeliite mineral
Clinochlore
Scolecite mineral
Selenite crystals
Baryte crystals
Prismatic beryl crystal
Magnesite crystals in groundmass
Spine crystals in quartz groundmass
Diaspore crystals in emery groundmass
Artinite crystals in rock groundmass
Crystalline brucite in groundmass
Boleite crystals in gypsum groundmass
Nugget of Fool's Gold, iron pyrites
Sphalerite & chalcopyrite
Sphalerite on calcite
Fluorite
Tiger eye
Meyerhofferite mineral
Stephanite crystals, close-up
Polybasite crystals, close-up
Rough Diaspore
Antimonite