Actinolite crystals
Actinolite, Chester, Vermont, USA
Titanite crystals in actinolite
Nephrite crystals
Actinolite
Actinolite crystals with talc
Actinolite, Tyringham, Massachusetts, USA
Actinolite mineral, light micrograph
Ilmenite crystal with actinolite and quartz
Jade sword handle
Tremolite crystals
Jadeite carved dish from China
Nephrite jade specimen
Asbestos sample
緑閃石
Anthophyllite asbestos
Amphibole Asbestos, Maryland, USA
Azurite crystals
Asbestos veins in serpentinite
Canari asbestos plant, Corsica
Asbestos fibres
Serpentine groundmass with chrysotile
Pyrite crystals
Fluorspar crystals
Chrysotile in groundmass, close-up
Brochantite and azurite crystals
Gibbsite
Tremolite, New Jersey, USA.
actinolite
Chromite
Uraninite in calcite
Malachite-based mineral deposit
Banded iron ore
Silver deposits in quartzite
Azurite.
Metamorphic rock
Chrysocolla with azurite
Fibrous crystals of riebeckite on rock groundmass
Arsenopyrite
Forms of copper ore
Azurite in Limonite Groundmass
Realgar with grey quartz
Spherical concretions of radiating azurite crystals
Galenite and quartz crystals
Chromite and serpentine
Pyrite crystals in their host rock
Amphibolite, light micrograph
Malachite and Azurite
A specimen of the mineral azurite found in Eire
Chrysotile asbestos fibers
Chrysotile
Chrysotile Asbestos
Azurite, an ore of Copper
Azurite and malachite deposits
Nagyagite
Native copper
Asbestos fibres, SEM
Dioptase crystals
Fluorite crystals
Apatite crystals
Selenite crystals
Baryte crystals
Tremolite variety Hexagonite
Twinned staurolite crystals
Twinned fluorite crystals
Mineral deposition
Orpiment on pyrite
Cordierite crystals in rock groundmass
Magnetite and calcite
Cuprocassiterite in quartz mica schist
Pseudomorphic crystal growth
Pyrolusite in quartz
Zinc ore under ultraviolet light
Zinc ore
Chrysocolla, macrophotograph
Haematite specimen
Dendritic copper specimen
Diamond processing, Siberia, Russia
Opal on bedrock
Haematite (kidney ore)
Chrysocolla mineral
Cobaltine mineral, cobalt ore
Molybdenite mineral, molybdenum ore
Datolite crystals
Lizardite in serpentine rock
Aragonite crystals
Vanadinite crystals
Fibres of Amosite, brown asbestos
Azurite crystals, SEM
Cerussite
Sample of haematite
Magnetite in quartz
Haematite mineral rock
Bournonite
Silver wire, mine specimen
Scanning Electron micrograph of asbestos, 1200x
Stilbite crystal group
Realgar
Smithsonite encrustation
Fluorite and barite crystals
Pyrargyrite crystals
Banded iron specimen
Banded iron formation
Apatite crystal
Jasper
Malachite
Campo del Cielo meteorite fragment
Malachite mineral sample
Cobalt calcite mineral sample
Selenite mineral sample
Quartz monzonite
Iris agate
Fairburn agate
Union road agate
Lysite agate
Moss agate
Lake Superior agate
Paint rock agate
Paul Bunyon plume agate
Siam Siding agate
Plume agate
Fourth of July Butte agate
Pompon agate
Blue Bed thunder egg agate
Priday plume agate
Antelope agate
Agate
Coyamito agate
Bubble lace agate
Sweetwater agates
Sagenitic agate
Montana moss agate
Frieda thunder egg agate
Succor Creek thunder egg agate
Oregon Beach agates
Omineca agate
Crater agate
Ocean jasper agate
Queensland agate