Native gold on quartz
Quartz crystals, SEM
Feldspar and quartz
Smoky quartz
Quartz crystal, SEM
Quartz coated with silica
Zinnwaldite mineral group
Almandine
Almandine close
Citrine
Steatite (soapstone)
Cut Quartz gemstone
Amethyst crystals
Concentric banding in agate
Rose Quartz
Tourmaline on quartz
Tiger eye, thin section micrograph
Tiger eye, light micrograph
Tiger eye, polished surface
Chrysocolla mineral
Azurite on Chrysocolla substrate
Scolecite
Microcline mineral
Ruby in zoisite
Kyanite
Agate
Chalcedony
Gold embedded in quartz groundmass
Citrine crystal group
Dendrites in agate
Apophyllite crystals
Yellow crystal
Rutile quartz
Sodalite
Smokey quartz crystal, Kirlian photograph
Mesolite
Rutile in Quartz
Raw garnet crystal
Beryl crystals
Pink beryl crystal, SEM
Rough pinkish-red Rubellite
Rare bright green Uvarovite Garnet
Tourmaline
Zircon crystals on host rock
Axinite
Tourmaline crystal, thin section
Twinned augite crystals
Hornblende crystals
Malachite and chrysocolla minerals
Pyroxene crystal, thin section
Quartz
Prehnite and okenite
Stilbite crystal group
Cut Scapolite round gemstone
Brecciated jasper
Fayalite
Pyrite and quartz, crystalline
Fire Opal
Glass
Discovery of Glass
Mineral combination
Pyrite on quartz
Quartz crystals
Tourmaline cross section
Tourmaline unworked stones
Pallasite meteorite fragment
Smoky quartz crystals
Pyrophyllite and quartz in groundmass
Calcite crystal rosettes
Gypsum stone
Information storage in DNA and silica
Carnelian
Galena
Sample of feldspar
Quartz encrusted calcite crystals
Sample of muscovite
Double-ended quartz crystal
Quartz and pyrite
Garnet
Cut Indicolite gemstone
Cut Cordierite (Iolite) gemstone
Cut Kyanite gemstone
Cut Pyrope gemstone
Cut Scapolite gemstone
Cut yellow Vesuvianite gemstone
Trillion cut tourmaline gemstone
Round cut red Andesine
Cut green Paraiba Tourmaline gemstone
Cut Zircon gemstone
Diatomaceous earth quarry
Lapis lazuli crystals I
Lapis lazuli crystals II
Quartz crystal and limonite mineral
Fluorite on quartz crystals
Pink quartz heart
Smoky Quartz in Milky Quartz Groundmass
Spine crystals in quartz groundmass
Childrenite crystal in quartz
Quartz filled geode
Columnar Quartz crystals
Leopard skin jasper close
Leopard skin jasper II
Leopard skin jasper I
Moss agate
Asbestos sample
Fluorite crystals on quartz, close up
Olvienite crystal amongst quartz
Chalcopyrite and quartz crystals
Tetrahedrite and quartz crystals
Quartz with Galena & sphalerit
Baryte and smoky quartz crystals
Section of quartz crystal geode
Quartz needle crystals
Galena & sphalerite on quartz substrate
Chabazite
Cut Rose Quartz gemstone
Native gold
Flourite crystal, Kirlian photograph
Citrine gemstones and crystal
Rutilated quartz
Aragonite crystals
Chalcocite crystals
Dendritic mineralisations in chalcedony
Calcite crystal
Calcite
Quartz crystal
Quartz mineral
Apophyllite
Cut green Tourmaline gemstone
Cut Spessartine gemstone
Cut pink Topaz gemstone
Cut pink topaz gemstone
Emerald
Container of the food additive E554
Container of the food additive E555
Container of the food additive E556
Container of the food additive E557
Container of the food additive E559
Container of the food additive E560
Lizardite in serpentine rock
Enstatite
Japanese twin quartz crystal
Smoky quartz crystal
Quartz crystal structure
Tourmaline crystals in quartz
Borax (Sodium tetraborate decahydrate)
Apophyllite on calcite