Aragonite-covered crayfish
Aragonite floral crystals
Ammonite fossils
Aragonite
Coral limestone
Aragonite crystals
Botryoidal aragonite
Aragonite, folded
Calcium carbonate precipitation
Calcite crystal rosettes
Aragonite botryoidal precipitate
Mollusc shell, SEM
Aragonite crystals with sulphur
Flos-ferri aragonite
Geothermal limestone terrace
Geothermal limestone deposit
Foraminifer Globigerina bulloides, model
Synthetic abalone shell, SEM
calcite veining in limestone
Pisolitic calcium carbonate
Fossil debris in chalk, SEM
Aragonite (Sprudelstein)
Sample of chalk
Sample of limestone
Brazilianite crystals in calcite
Cut and polished septarian nodule
Calcite in mudstone
Flos ferri aragonite in rock groundmass
Limestone and shale strata
Sample of calcite
Calcite crystals
Coral calcite crystals
Silver crystals in calcite
Magnetite and calcite
Pseudomorphic crystal growth
Calcite crystal
Calcite
Graphite on calcite crystals
Apophyllite on calcite
Pink calcite crystals
Zinc ore under ultraviolet light
Zinc ore
Zincite in fraklinite
Quartz encrusted calcite crystals
Septarian nodule
Lithographic limestone
Grey limestone and iron oxide
Limestone
Yellow limestone
Scalenohedral calcite crystals
Calcareous phytoplankton, SEM
Foraminiferan fossil, SEM
Foraminifera
Planktonic foraminifer (Nodosaria tetragona)
Fossils in Cuban balustrade.
Pisolite
Marble
Sea urchin spine, SEM
Fossil ammonite
Oolitic limestone, light micrograph
Red calcite crystals
Foraminifera are large shelled amoebas
Foraminifer Bigenerina nodosaria, model
Nautilus shell fragment, SEM
Nautilus shell layers, SEM
Cerussite
Magnesite crystals in groundmass
Magnesite vein in igneous rock
Coccolithophore shell, SEM
Ammonite fossil
Deformed calcite crystal
Crenulation cleavage in calcite
Calcite globules
Septarian nodule surface
Crystalline calcite
Chalk cliffs, Cyprus
Macrophotograph of crystals of calcite
Calcite crystal group
Skalenoedric calcite crystals
Calcium carbonate crystals, SEM
Red calcite, Mexico
Pair of Aptychi (Lamellaptychi)
Calcite rock concretion
Sylvanite crystals
Fossil sea urchin spine, SEM
Stromatolite crystals, SEM
Fossil algae
Oxynoticeras ammonite fossil
Abalone shell, SEM
Scalenohedral calcite, close-up
Crane fly in baltic amber
Fossilised insects (sciaridae) in Baltic amber
Fly in amber
Professor Stephen Mann, British chemist
SEM of a synthetic shell of calcium carbonate
Coccolithophore, SEM
Flos-ferris Aragonite
Eisenblute
Sea urchin fossil
Nautilus siphuncle structure, SEM
Nautilus siphuncle crystals, SEM
Muschelkalk limestone, light micrograph
Crinoidal limestone, light micrograph
Foraminiferan shells, macrophotograph
Ammonite Assemblage
Ammonite fossil, thin section
Sponge spicules, SEM
Coral skeleton
Brain coral
Marble, polarised light micrograph
Chalk cliffs, south-east England
Amber
Sea urchin spine, polarised microscopy
Conch shells
Fossil Ostracod, SEM
Foraminifera, polarised light micrograph
Glowing limestone chip
A fossil crinoid, Pentacrinites fossils
Mosquito in amber
Insect in amber
Spider in amber
Insects fossilised in amber