Neptunite
Lizardite in serpentine rock
Smoky quartz crystals
Enstatite
Sample of feldspar
Microcline mineral
Asbestos veins in serpentinite
Axinite
Biotite mineral in orthopyroxene
Malachite and chrysocolla minerals
Kyanite
Chrysocolla mineral
Beryl crystals
Gneiss with garnet
Smoky quartz
Fire Opal
Hornblende crystals
Pyroxene crystal, thin section
Sample of muscovite
Citrine
Quartz crystals, SEM
Tourmaline crystal, thin section
Black tourmaline, SEM
Emerald
Quartz crystal, SEM
Gneiss with garnet, light micrograph
Zircon crystals on host rock
Cobalt chloride crystals
Zinnwaldite mineral group
Feldspar and quartz
Raw garnet crystal
Twinned augite crystals
Concentric banding in agate
Quartz coated with silica
Radiolarian skeleton, artwork
Yellow crystal
Lapis lazuli, SEM
Moss agate
Pink beryl crystal, SEM
Uncut emeralds
Aventurine
Cut Diopside gemstone
Rose Quartz
Tourmaline on quartz
Tourmaline unworked stones
Almandine
Scolecite
Yellow-green Tourmaline rough
Round cut red Andesine
Cut Quartz gemstone
Ruby in zoisite
Stilbite crystal group
Prehnite and okenite
Agate
Chalcedony
Pallasite meteorite fragment
Almandine close
Carnelian
Tourmaline
Apophyllite crystals
Container of the food additive E550
Container of the food additive E553a
Container of the food additive E554
Container of the food additive E555
Container of the food additive E560
Container of the food additive E552
Container of the food additive E556
Container of the food additive E557
Container of the food additive E559
Cut Indicolite gemstone
Cut Kyanite gemstone
Cut Pyrope gemstone
Rare bright green Uvarovite Garnet
Cut yellow Vesuvianite gemstone
Apophyllite on calcite
Trillion cut tourmaline gemstone
Cut green Paraiba Tourmaline gemstone
Cut Zircon gemstone
Coral sand sample, SEM
Gypsum crystals
Aragonite
calcite veining in limestone
Polyhalite, close-up
Chabazite
Cut Watermelon Tourmaline gemstone
Rough pinkish-red Rubellite
Cut Spessartine gemstone
Dendrites in agate
Cut pink topaz gemstone
Lapis lazuli crystals I
Lapis lazuli crystals II
Kernite crystal
Aragonite crystals
Epsomite, close-up
Calcareous soil
Amethyst crystals
Citrine crystal group
Glass
Tourmaline cross section
Apophyllite
Sodalite
Garnet
Cut Cordierite (Iolite) gemstone
Cut Scapolite gemstone
Radiolaria, light micrograph
Selenite crystals
Fluorite and barite crystals
Fluorite in dolomite
Barite crystals, an ore of Barium
Barite crystal
Aragonite crystals with sulphur
Bismutine
Lazulite in groundmass of quartz
Magnesite vein in igneous rock
Cut green Tourmaline gemstone
Cut pink Topaz gemstone
Barite crystals
Fluorite crystals
Barite and chalcopyrite crystals
Polished limestone
Marble
Decrotive Paesina stone
Bauxite, aluminium ore
Alum (Aluminum Potassium Sulfate)
Chalcocite crystals
Gibbsite
Sphalerite crystals
Epsom salt, SEM
Copper sulphate crystals light micrograph
Calcite crystals
Coral calcite crystals
Brazilianite crystals in calcite
Magnetite and calcite
Flos-ferri aragonite
Pseudomorphic crystal growth
Pisolite
Crystalline calcite
Pink calcite crystals
Zinc ore under ultraviolet light
Zinc ore
Calcite in mudstone
Calcite
Chalk cliffs, Cyprus
Zincite in fraklinite
Septarian nodule
Lithographic limestone
Limestone
Yellow limestone
Calcium carbonate precipitation
Macrophotograph of crystals of calcite
Calcite crystal group