Chrysocolla mineral
Malachite and chrysocolla minerals
Azurite on Chrysocolla substrate
Chrysocolla
Chrysocolla, macrophotograph
Axinite
Beryl crystals
Concentric banding in agate
Quartz coated with silica
Citrine
Almandine
Zinnwaldite mineral group
Microcline mineral
Feldspar and quartz
Zircon crystals on host rock
Magnetite and calcite
Kyanite
Tourmaline
Tourmaline on quartz
Rare bright green Uvarovite Garnet
Tourmaline unworked stones
Pink beryl crystal, SEM
Chalcocite crystals
Pallasite meteorite fragment
Prehnite and okenite
Stilbite crystal group
Ruby in zoisite
Tetrahedrite
Rose Quartz
Sample of muscovite
Apophyllite on calcite
Sample of feldspar
Lizardite in serpentine rock
Quartz crystals, SEM
Quartz crystal, SEM
Dioptase mineral sample
Rough pinkish-red Rubellite
Chalcopyrite and quartz crystals
Apophyllite crystals
Raw garnet crystal
Tourmaline crystal, thin section
Chrysocolla, Arizona, USA
Agate
Chalcedony
Scapolite mineral sample
Gneiss with garnet
Chrysocolla, a minor ore of Copper
Hornblende crystals
Pyroxene crystal, thin section
Smoky quartz
Chalcosite
Tourmaline cross section
Scolecite
Cuprocassiterite in quartz mica schist
Native copper
Fluorite mineral
Torbernite
Barite and chalcopyrite crystals
Botryoidal Malachite on chrysocolia
Stalactitic habit of malachite
Smithsonite
Tenorite mineral crystals
Tetrahedrite mineral specimen
Aragonite crystals with sulphur
Graphite on calcite crystals
Stibnite
Calcite crystals
Coral calcite crystals
Brazilianite crystals in calcite
Aragonite crystals
Flos-ferri aragonite
Pseudomorphic crystal growth
Gypsum stone
Cut and polished septarian nodule
Pink calcite crystals
Calcite
Zincite in fraklinite
Septarian nodule
Calcium carbonate precipitation
Aragonite
Scalenohedral calcite crystals
Cerussite
Magnesite crystals in groundmass
Scalenohedral calcite, close-up
Emerald
Gneiss with garnet, light micrograph
Anatase mineral (titanium oxide)
Twinned augite crystals
Brochantite
Malachite-based mineral deposit
Asbestos veins in serpentinite
Hedyphane
Chrysocolla with azurite
Thulite mineral
Berzeliite mineral
Kyanite mineral
Scolecite mineral
Dendritic mineral crystals
Copper sulphate crystal
Polished vivid blue chrysocolla pebble
Chrysocolla in groundmass, close-up
Molybdenite mineral, molybdenum ore
Malachite mineral sample
Cobalt calcite mineral sample
Selenite mineral sample
Silver crystals in calcite
Calcite crystal
Quartz encrusted calcite crystals
Chalcopyrite, SEM
Lapis lazuli, SEM
Moss agate
Nitratine mineral (sodium nitrate)
Citrine crystal group
Covellite, thin section micrograph
Crocoite
Blue labradorite
Botryoidal malachite
Polished slab of Malachite
Malachite
Chalcopyrite mineral
Wavellite
Scapolite crystals in rock groundmass
Enstatite
Barytocalcite crystals in rock groundmass
Ankerite crystals in groundmass, close-up
Artinite crystals in rock groundmass
Chalcanthite crystals in rock groundmass
Linarite in rock groundmass, close-up
Fibrous antlerite
Microcrystalline antlerite
Magnetite in quartz
Cobaltite and chalcopyrite crystals
Celestine crystals in sulphur groundmass
Pyrolusite
Nailhead calcite and galena
Calcite crystal rosettes
Amethyst crystals
Cut Kyanite gemstone
Cut Pyrope gemstone
Yellow-green Tourmaline rough
Bournonite
Olvienite crystal amongst quartz