Quartz crystals, SEM
Quartz crystal, SEM
Pink beryl crystal, SEM
Malachite crystals, SEM
Quartz coated with silica
Beryl crystals
Hydrated copper sulphate crystals, SEM
Feldspar and quartz
Citrine
Smoky quartz
Zinnwaldite mineral group
Rose quartz crystals, SEM
Chalcopyrite, SEM
Sea salt crystals, SEM
Concentric banding in agate
Azurite crystals, SEM
Amethyst crystals
Zircon crystals on host rock
Agate
Chalcedony
Crystalline manganese, SEM
Quartz encrusted calcite crystals
Quartz crystals
Citrine crystal group
Hornblende crystals
Japanese twin quartz crystal
Twinned augite crystals
Rose Quartz
Sapphire, SEM
Calcium carbonate crystals, SEM
Tourmaline on quartz
Axinite
Chrysocolla mineral
Kyanite
Apophyllite crystals
Magnetite, SEM
Lapis lazuli, SEM
Cut Quartz gemstone
Native gold on quartz
Smoky quartz crystals
Smoky Quartz in Milky Quartz Groundmass
Childrenite crystal in quartz
Tourmaline crystal, thin section
Ruby in zoisite
Almandine
Gypsum stone
Calcite crystal rosettes
Pallasite meteorite fragment
Zinc oxide crystals, SEM
Quartz nodule, polarised light micrograph
Sugar crystals, SEM
Quartz needle crystals
Tourmaline
Rough pinkish-red Rubellite
Rare bright green Uvarovite Garnet
Rutilated quartz
Gas hydrate crystals, SEM
Fluorite on quartz crystals
Chalcopyrite and quartz crystals
Tetrahedrite and quartz crystals
Agate silica crystals in stone
Apophyllite on calcite
Pink quartz heart
Rose quartz mineral, artwork
Elbaite on albite and quartz
Steatite (soapstone)
Spine crystals in quartz groundmass
Dolerite rock crystals, polarised LM
Schorl and quartz crystals in groundmass
Fluorapatite crystal, SEM
Ruby crystals, SEM
Salt crystals, SEM
Matildite crystals, SEM
Brushite crystals, SEM
Calcium phosphate crystals, SEM
Fluorapatite crystals, SEM
Apatite crystals, SEM
Sodium phosphate crystals, SEM
Tourmaline unworked stones
Raw garnet crystal
Microcline mineral
Malachite and chrysocolla minerals
Pyroxene crystal, thin section
Prehnite and okenite
Quartz
Stilbite crystal group
Moss agate
Fractured glass edge and surface, SEM
Calcium carbonate crystal, SEM
Rock Crystal
Double-ended quartz crystal
Smoky quartz crystal
Sphalerite crystals
Aragonite crystals
Sample of feldspar
Lizardite in serpentine rock
Chalcocite crystals
Quartz crystal and limonite mineral
Black tourmaline, SEM
Yellow crystal
Fire Opal
Hydrated copper sulphate crystals
Geode, thin section micrograph
Galenite and quartz crystals
Chabazite crystals in quartz
Orthoclase and quartz crystals
Glass
Basalt, light micrograph
Crystals of haematite in quartz
Coral sand sample, SEM
Concrete, ESEM
Tubular hexagons of quartz
Olvienite crystal amongst quartz
Richterite in quartz groundmass
Agate mineral rock cross section