Calcite crystals on mordenite
Calcite crystals
Rhodochrosite
Calcite
Calcite crystals and Chalcopyrite
Graphite on calcite crystals
Ankerite with calcite
Millerite in calcite groundmass, close-up
Cleaved calcite rhombs, close-up
Cinnabar on calcite rock groundmass
Double refraction of light in calcite
A sample of galena and calcite
Calcite spherulites
Calcite or Dogtooth Spar
Columnar calcite, fluorescent
Cobalt calcite mineral sample
Uraninite in calcite
calcite veining in limestone
Willemite and calcite
Folds of calcite in limestone rock
Specimen of calcite crystal mined in Cumbria
Quartz encrusted calcite crystals
Scalenohedral calcite crystals
Calcite crystal
Franklinite
Flos ferri aragonite in rock groundmass
Rock strata
Septarian concretions with calcite
Calcite in mudstone
Franklinitein calcite groundmass
Calcite on sphalerite
Wollastonite and calcite
Dioptase twins in Calcite
Green Calcite Crystal Gemstone
Red calcite, Mexico
Blue Calcite Crystal Gemstone
Magnesite crystals in groundmass
Green Calcite a Crystal Gemstone
Septarian Geode
Coral calcite crystals
Silver crystals in calcite
Brazilianite crystals in calcite
Pink calcite crystals
Skalenoedric calcite crystals
Rhodochrosite close-up, Argentina
Rhodochrosite, South Africa
Calcite globules
Birefringence in a calcite crystal
Macrophotograph of crystals of calcite
Sylvanite crystals in calcite groundmass
Berzeliite mineral
Aragonite
Lazurite crystals in a matrix of calcite
Strontianite and Calcite
Calcite crystal specimen
Red calcite crystals
Calcite mineral, light micrograph
Scalenohedral calcite, close-up
Apophyllite on calcite
Calcite on amethyst
Orange Calcite Crystal Gemstone
Red Calcite Crystal Gemstone
Scolecite crystals
Calcite, Cleavage Rhombohedron
Crossing calcite veins in limestone
Chalcocite crystals
Limburgite, thin section micrograph
Septarian nodule
Calcium carbonate precipitation
Sample of chalk
Chondrodite, polarised light micrograph
Berzelianite
Magnesite vein in igneous rock
Crystalline calcite
Sample of calcite
Magnetite and calcite
Calcite crystal group
Prehnite and calcite in groundmass
Geothermal limestone terrace
Deformed calcite crystal
Sphalerite and ankerite crystals
Willemite (green) and Calcite (white)
Native silver
Magnesite
Chalk cliffs, Cyprus
Pisolitic calcium carbonate
Cave stalagmites
Silver wire, mine specimen
Oxynoticeras ammonite fossil
Fossil ammonite
Orange crystal
Lapis lazuli specimen
Green apophyllite
Nailhead calcite and galena
Pyrites Ammonite spiral Calcite crystals
Crenulation cleavage in calcite
Calcite rock concretion
Limburgite
Double refraction in a calcite crystal
Fluorite crystals
Marble
Sample of limestone
Lapis lazuli
Pseudomorphic crystal growth
Cut and polished septarian nodule
Zinc ore under ultraviolet light
Zinc ore
Zincite in fraklinite
Rhodochrosite mineral
Lithographic limestone
Limestone
Yellow limestone
Brown monticellite
Mineral samples
Aragonite-covered crayfish
Coral limestone
Aragonite floral crystals
Calcium carbonate crystals, SEM
Vesuvianite specimen
Calcite crystals, SEM
Rhodochrosite and pyrite
Calcite crystals.
Limestone and shale strata
Septarian nodule surface
Grey limestone and iron oxide
Geothermal limestone deposit
Pamukkale travertine deposits
Dioptase
Calcite crystal rosettes
Biotite in calcite groundmass
Fluorescent Willemite, Calcite, UV light
Willemite and Calcite under white light
Chequerboard veins in limestone
Moh's Hardness Scale
Melaphyr rock, light micrograph
Biomineralisation bacteria, SEM
Marble, polarised light micrograph
Ammonite fossil, thin section
Moss agate
Glowing limestone chip
Tetrahedrite and calcite crystals
Scolecite mineral
Gmelinite
Mollusc shell, SEM