Bournonite
Prismatic manganite crystals
Cluster of pyrite cubes
String of pyrite cubes
Bournonite on Gypsum Substrate I
Bournonite on Gypsum Substrate II
Manganite
Torbernite
Stibnite mineral
Stibnite (Antimonite)
Tenorite mineral crystals
Stibnite
Hessonite
Rough topaz
Chrysocolla mineral
Chalcocite crystals
Stibnite crystals
Chalcopyrite and quartz crystals
Cuprocassiterite in quartz mica schist
Dioptase mineral sample
Native copper
Chalcopyrite, SEM
Olvienite crystal amongst quartz
Chalcosite
Tetrahedrite
Cassiterite tin ore
Hedyphane
Quartz crystal and limonite mineral
Quartz crystals
Epidote crystals
Dendritic copper specimen
Antimonite
Copper
Covellite, thin section micrograph
Tetrahedrite mineral specimen
Fibrous antlerite
Microcrystalline antlerite
Brochantite
Enargite mineral
Stephanite crystals, close-up
Polybasite crystals, close-up
Astrophyllite
Pyrargyrite crystals, close-up
Chalcotrichite crystals
Azurite crystals
Gypsum crystal group
Calcite
Tetrahedrite and quartz crystals
Magnetite and calcite
Magnetite in quartz
Smithsonite
Aurichalcite in limonite groundmass
Bismuth, close-up
Pyromorphite in limonite groundmass
Stibnite, Canada
Botswana agate stone
Aragonite crystals
Jasper polished stone
Brecciated Jasper stone
Kyanite crystal
Labradorite rock crystals
Fire agate
Desert rose mineral clusters
Garnet crystal and rock
Yellow Jasper
Pyrolusite
Malachite-based mineral deposit
Libethenite
Chrysocolla
Jamesonite
Bournonite in quartz groundmass, close-up
Calcite bladed crystals
Actinolite crystals with talc
Double-ended quartz crystal
Borax (Sodium tetraborate decahydrate)
Tourmaline schorl specimen
Fluorite crystals
Apatite crystal
Malachite mineral sample
Cobalt calcite mineral sample
Selenite mineral sample
Thulite mineral
Berzeliite mineral
Twinned staurolite crystals
Twinned fluorite crystals
Clinochlore
Chromite
Apatite crystals
Fluorspar crystals
Kyanite mineral
Scolecite mineral
Selenite crystals
Porphyritic texture in an igneous rock
Prehnite and okenite minerals
Calcite spherulites
Autunite crystals, close-up
Childrenite crystal in quartz
Heulandite crystal
Analcime or analcite crystal
Baryte crystals
Prismatic parallel crystals of allanite
Willemite crystal
Prismatic Piemontite crystals
Prismatic beryl crystal
Fibrous sillimanite
Prismatic crocoite crystals
Bladed radial form of desert rose gypsum
Lizardite crystal
Monazite crystal
Purple-blue geode
Adamite mineral
Garnierite crystals on rock surface
Cyanotrichite crystals on rock surface
Ilvaite crystal
Dolomite in Quartz Groundmass
Strontianite mineral
Milky Quartz
Clinochlore crystals in rock groundmass
Witherite mineral in crystal form
Rock Crystal
Aegirine crystal in rock groundmass
Datolite crystals, close-up
Wavellite
Mercury, close-up
Mercury
Smoky Quartz in Milky Quartz Groundmass
Arsenic
Riebeckite crystals in groundmass
Pectolite crystals
Microcline in rock groundmass
Albite crystals, close-up
Axinite
Matildite crystals, SEM
Diaspore
Pseudomorphic crystal growth
Chalcopyrite
Cobaltite and chalcopyrite crystals
Tubular hexagons of quartz
Carnelian gemstone
Bismuth crystals
Crystalline manganese, SEM
Fossilised sponge
Paraconularia fossil
Zinnwaldite mineral group
Copper sulphate crystal
Chalcopyrite crystals
Libethenite mineral
Sphalerite crystals
Zeophyllite
Hemimorphite crystals
Sulphur crystals
Strontianite crystals
Gypsum crystals
Uvarovite garnet crystals
Carved malachite column
Topaz gemstone
Haematite mineral specimen
Nosean on sanidine
Proustite
Radial acicular crystals of antimonite
Ullmannite mineral crystals
Berzelianite
Molybdenite mineral, molybdenum ore