Staurolite, twinning cross
Scolecite
Stilbite crystal group
Azurite on Chrysocolla substrate
Axinite
Fayalite
Crystal growing, atom probe tomography
Kyanite and Staurolite crystals
Lazulite
Labradorite
Asbestos sample
Azurite nodule
Azurite
Almandine
Prehnite and okenite
Almandine close
Alloy precipitate, STEM
Age hardening, atom probe tomography
Apophyllite crystals
Chrysocolla mineral
Malachite and chrysocolla minerals
Amethyst crystals
Tourmaline cross section
Pallasite meteorite fragment
Blue labradorite
Asbestos veins in serpentinite
Sphalerite on strontianite
Canari asbestos plant, Corsica
Twinned staurolite crystals
Azurite sample
Staurolite crystal, light micrograph
Ruby in zoisite
Zinnwaldite mineral group
Feldspar and quartz
Chabazite
Testing the reactivity of four metals
Kyanite
Sample of muscovite
Concentric banding in agate
Container of the food additive E557
Twinned augite crystals
Hornblende crystals
Pyroxene crystal, thin section
Lazulite in groundmass of quartz
Container of the food additive E553a
Staurolite phenocrysts, polarised light micrograph
Staurolite in mica schist groundmass
Mesolite
Lavoisier's chemical elements list, 1789
Brochantite
Asbestos fibres, SEM
Labradorite with linear iridescence
Rhodonite
Colourful gemstones
Raw garnet crystal
Agate
Chalcedony
Tourmaline crystal, thin section
Citrine crystal group
Tourmaline unworked stones
Tourmaline
Tourmaline on quartz
Beryl crystals
Pink beryl crystal, SEM
Cut Scapolite round gemstone
Rough pinkish-red Rubellite
Rare bright green Uvarovite Garnet
Quartz coated with silica
Chromite and serpentine
Cut Spessartine gemstone
Tiger eye, polished surface
Tiger eye, thin section micrograph
Moss agate
Leopard skin jasper close
Leopard skin jasper II
Leopard skin jasper I
Tiger eye, light micrograph
Malachite & Azurite I
Malachite & Azurite II
Azurite crystals
Microcline mineral
Native gold on quartz
Zinc blende
Micrometeorite, SEM
Turquoise mineral
Dendrites in agate
Expanded vermiculite pellet, SEM
Open cast copper mining in Arizona
Smithsonite
Staurolite crystals
Gibbsite
Magnesite
Magnesite vein in igneous rock
Zinc oxide with hazard pictograms
Container of the food additive E554
Container of the food additive E555
Container of the food additive E556
Container of the food additive E559
Staurolite, Patrick County, Virginia, USA
Lapis lazuli crystals I
Lapis lazuli crystals II
Sphalerite on calcite
Sphalerite and pyrite
Hemimorphite
Crocoite
blue apatite
Zincite
Quartz crystals, SEM
Steatite (soapstone)
Zircon crystals on host rock
Quartz crystal, SEM
Rose Quartz
Citrine
Smoky quartz
Zinc oxide crystals, SEM
Phytic acid molecule
Reaction of metals in hydrochloric acid
Tree nuts
Metals in acid
Vauquelinite
Manganite
Brecciated jasper
Yellow crystal
Garnet
Black tourmaline, SEM
Lapis lazuli, SEM
Barred olivine chondrule
Emerald
Cut pink topaz gemstone
Cut green Tourmaline gemstone
Cut Indicolite gemstone
Cut Cordierite (Iolite) gemstone
Cut Kyanite gemstone
Cut Pyrope gemstone
Cut Scapolite gemstone
Cut Watermelon Tourmaline gemstone
Yellow-green Tourmaline rough
Trillion cut tourmaline gemstone
Cut green Paraiba Tourmaline gemstone
Cut pink Topaz gemstone