Cassiterite tin ore
Wulfenite
Quartz and pyrite
Pyrite on quartz
Amethyst crystals
Cubic perovskite crystals in groundmass
Wulfenite crystals
Cassiterite crystals
Analcime crystal group
Molybdenite mineral, molybdenum ore
Sphalerite and pyrite
Chromite
Fluorspar crystals
Dodecahedral crystal of spessartine
Rhombohedral siderite crystals
Cobaltine mineral, cobalt ore
Periklin crystals
Pectolite
Tenorite mineral crystals
Grossular
Light reflection
Almandine
Cluster of pyrite cubes
Chalcopyrite, SEM
Smithsonite
Magnetite and calcite
Magnetite in quartz
Cuprocassiterite in quartz mica schist
Native copper
Chrysotile in groundmass, close-up
Cassiterite cyrstals, East Pell
Andradite
Spinel in Schist
Cassiterite crystal
Quartz coated with silica
Quartz crystals
Tourmaline crystals in quartz
Smoky quartz crystals
Sulphur crystal
Calcite crystals
Rhodochrosite mineral
Quartz and cassiterite crystals
Blue Hauyne crystals in lava groundmass
Tabular muscovite crystals and apatite
Biotite in rock groundmass
Sanidine on trachyte lava groundmass
Lepidolite in pegmatitic groundmass
Pink-white chabazite in basalt groundmass
Muscovite crystals in rock groundmass
Rock mineral crystals, polarised LM
Sample of basalt
Zeophyllite
Andesite
Muscovite and feldspar
Tubular hexagons of quartz
Rhyolite
Microcline
Axinite
Brazilianite crystals in calcite
Molybdenite in granite
Muscovite mineral sample
Titanite bearing granite
Basaltic dyke rock
Fuchsite mineral stone
Cut and polished septarian nodule
Quartz vein in granite
Mica schist folds, light micrograph
Emeralds
Graphic granite rock
Granite
Peridotite
Garnet in peridotite
Arsenopyrite
Childrenite crystal in quartz
Prismatic parallel crystals of allanite
Willemite crystal
Dolomite in Quartz Groundmass
Clinochlore crystals in rock groundmass
Aegirine crystal in rock groundmass
Riebeckite crystals in groundmass
Microcline in rock groundmass
Hemimorphite
Soap films on a pyramid
Cassiterite crystals in groundmass
Chalcosite
Feldspar and quartz
Stibnite
Stibnite mineral
Cerussite
Tremolite crystals
Pseudomorphic crystal growth
Galenite and quartz crystals
Pyrolusite in quartz
Silver wire, mine specimen
Haematite mineral rock
Pyrite crystals in their host rock
Pyrite crystals
Haematite mineral specimen
Hessonite
Red calcite crystals
Tower of tin cans
Rough topaz
Chromite and serpentine
Microdiamond crystal
Rutilated quartz
Gold ore
Molybdenite in granite groundmass
Zircon crystals on host rock
Rhyolite, light micrograph
Sphalerite
Aurichalcite in limonite groundmass
Gold embedded in quartz groundmass
Heulandite in rock groundmass, close-up
Pyromorphite in limonite groundmass
Glaucodot crystals in groundmass
Boleite crystals in gypsum groundmass
Nagyagite
Graphic tourmaline, light micrograph
Quartz mineral stone, light micrograph
Enargite mineral
Stephanite crystals, close-up
Polybasite crystals, close-up
Astrophyllite
Pyrargyrite crystals, close-up
Torbernite
Molybdenite
Fibrous antlerite
Microcrystalline antlerite
Baryte crystals
Prismatic beryl crystal
Witherite mineral in crystal form
Calcite spherulites
Fluorite crystals
Apatite crystal
Twinned staurolite crystals
Malachite mineral sample
Cobalt calcite mineral sample
Selenite mineral sample
Thulite mineral
Berzeliite mineral
Twinned fluorite crystals
Clinochlore
Apatite crystals
Kyanite mineral
Scolecite mineral
Selenite crystals
Porphyritic texture in an igneous rock
Prehnite and okenite minerals
Orange crystal
Vanadinite crystals
Galenite cubes
Pyrite interspersed with quartz
Rock coring drill
Banded iron ore
Galenite and marcasite
Kyanite and Staurolite crystals
String of pyrite cubes
Magnetite, SEM