Manmade Potassium Ferrocyanide
Alum (Aluminum Potassium Sulfate)
Synthetic ruby
Bismuth crystal
Barite crystals, an ore of Barium
Apophyllite on calcite
Synthetic diamond film
Graphite
Iron ore
Native Copper, Arizona, USA
Native Lead
Fibrous Goethite, Germany
Patronite, an ore of Vanadium
Wolframite ore of Tungsten
Fluorite
Gibbsite
Aragonite crystals
Neptunite
Hydrated copper sulphate crystals
Calcite crystals
Flos-ferris Aragonite
Copper sulphate crystal
Native Silver
Synthetic gemstones
Halite
Ozokerite or ozocerite mineral wax
Chlorargyrite
Smoky quartz crystals
Botryoidal chalcedony, close-up
Polyhalite, close-up
Enstatite
Bismutine
Lazulite in groundmass of quartz
Synthetic diamond film production
Chalcocite crystals
Goethite
Sphalerite crystals
Epsom salt, SEM
Copper sulphate crystals light micrograph
Jarosite on rock
Pseudomorphic crystal growth
Septarian nodule
Lithographic limestone
Limestone
Yellow limestone
Beryl crystals
Fluorocarbon molecule
Perfluorodecalin fluorocarbon molecule
Lump of coal, close up
Sample of feldspar
Kernite crystal
Wad, close-up
Epsomite, close-up
Cryolite, close-up
Diaboleite on rock surface, close-up
Hausmannite, close-up
Corundum, close-up
Calcareous soil
Potassium nitrate crystals
Hydrated copper (II) sulphate crystals
Gypsum crystals
Pyrolusite and psilomelane manganese ores
Lizardite in serpentine rock
Aragonite
calcite veining in limestone
Natural methane flame, Chimera, Turkey
Cuprite crystals
Connellite crystals
Crystals of potassium chloride
Potassium
Copper (II) oxide
Anhydrous copper (II) sulphate
Willemite
Native Copper, Michigan, USA
Copper Sulfate
Bauxite, an ore of Aluminum
Descloizite
Clinochlore
Fluorite crystals
Copper oxide crystals, SEM
Microcline, Potassium Feldspar
Sulfur crystals, Italy
Malachite, Arizona, USA
Native Copper, Chile
Native Copper
Native Copper (Cu)
Sulfur, a native element
Sulfur, Sicily, Italy
Graphite, Danville, Vermont, USA
Columbite
Goethite - Michigan
Cassiterite, Cornwall, England
Sulfur, Italy
Copper Ore
Bauxite, an ore of Aluminum, Arkansas
Molybdenum, Arizona, USA
Native Sulfur
Scheelite, an ore of Tungsten
Arsenopyrite
Native copper
Gold in its host rock
Apophyllite crystals
Sulphur crystals
Pyrite crystals
Crushed diamond, SEM
Heap of ground coal
Antimony, New Brunswick, Canada
Potassium dichromate crystallization, macrophotograph
Native silver
Potassium dichromate
Selenite crystals
Fluorite and barite crystals
Quartz encrusted calcite crystals
Potassium chloride
Barite crystal
Aragonite crystals with sulphur
Nephrite
Quartz crystals, SEM
Zeolite catalyst crystals, SEM
Titanium dioxide, SEM
Quartz crystal, SEM
Barite crystals
Barite and chalcopyrite crystals
Rock Salt or Halite specimen (NaCl)
halite
Halite or Rock Salt (NaCl)
Halite or Rock Salt
Halite, Morocco
Coral calcite crystals
Brazilianite crystals in calcite
Flos-ferri aragonite
Pisolite
Pink calcite crystals
Zinc ore under ultraviolet light
Zinc ore
Calcite in mudstone
Calcite
Calcium carbonate precipitation
Howlite crystals