Aragonite floral crystals
Botryoidal aragonite
Aragonite botryoidal precipitate
Aragonite-covered crayfish
Aragonite crystals
Aragonite crystals with sulphur
Aragonite
Calcium carbonate precipitation
Flos-ferri aragonite
Brazilianite crystals in calcite
Calcite crystals
Red calcite crystals
Coral calcite crystals
Silver crystals in calcite
Graphite on calcite crystals
Pink calcite crystals
Quartz encrusted calcite crystals
Scalenohedral calcite crystals
Cut and polished septarian nodule
Sylvanite crystals
Magnetite and calcite
Pseudomorphic crystal growth
Calcite crystal
Calcite
Apophyllite on calcite
Zincite in fraklinite
Septarian nodule
Aragonite, folded
Mollusc shell, SEM
Magnesite crystals in groundmass
Calcium carbonate crystals, SEM
Skalenoedric calcite crystals
Synthetic abalone shell, SEM
Macrophotograph of crystals of calcite
Ammonite fossils
Geothermal limestone terrace
Geothermal limestone deposit
Cerussite
Calcite crystal rosettes
calcite veining in limestone
Red calcite, Mexico
Crenulation cleavage in calcite
Calcite globules
Septarian nodule surface
Calcite crystal group
Flos ferri aragonite in rock groundmass
Pisolitic calcium carbonate
Scalenohedral calcite, close-up
Nautilus siphuncle crystals, SEM
Aragonite (Sprudelstein)
Limestone and shale strata
Sample of chalk
Sample of limestone
Calcite in mudstone
Mineral samples
Coral limestone
Foraminifer Globigerina bulloides, model
Pseudohexagonal aragonite crystals
Nautilus siphuncle structure, SEM
Zinc ore under ultraviolet light
Zinc ore
Lithographic limestone
Grey limestone and iron oxide
Limestone
Yellow limestone
Sample of calcite
Nailhead calcite and galena
Strontianite crystals
Rhombohedral siderite crystals
Barytocalcite crystals in rock groundmass
Artinite crystals in rock groundmass
Ankerite crystals in groundmass, close-up
Double refraction in a calcite crystal
Calcite spherulites
Cobalt calcite mineral sample
Berzeliite mineral
Sphalerite and ankerite crystals
Pisolite
Sylvanite crystals in calcite groundmass
Calcite rock concretion
Marble
Stromatolite crystals, SEM
Oolitic limestone, light micrograph
Magnesite vein in igneous rock
Fluorite crystals
Chalcocite crystals
Brown monticellite
Prehnite and calcite in groundmass
Franklinitein calcite groundmass
Millerite in calcite groundmass, close-up
Deformed calcite crystal
Crystalline calcite
Chalk cliffs, Cyprus
Nautilus shell fragment, SEM
Nautilus shell layers, SEM
Cerrusite
Nacre crystal layers, SEM
Ammonite fossil, thin section
Fossil debris in chalk, SEM
Fossil algae
SEM of a synthetic shell of calcium carbonate
Smithsonite
Coquina
Celestine crystals in sulphur groundmass
Beryl crystals
Planktonic foraminifer (Nodosaria tetragona)
Baryte crystals
Apatite crystals
Fluorspar crystals
Selenite crystals
Axinite
Orange crystal
Chondrodite, polarised light micrograph
Wollastonite and calcite
Silver wire, mine specimen
Rhodochrosite mineral
Twinned staurolite crystals
Twinned fluorite crystals
Agate mineral rock cross section
Turritella agate
Quartz filled concretion
Opalised fossil
Flos-ferris Aragonite
Lazurite crystals in a matrix of calcite
Calcium carbonate crystals, LM
Blue smithsonite in groundmass
Calcite crystals, SEM
Nacre crystalline surface, SEM