Stilbite crystal group
Scolecite
Prehnite and okenite
Stilbite crystals
Chabazite
Almandine
Feldspar and quartz
Ruby in zoisite
Apophyllite
Quartz coated with silica
Chrysocolla mineral
Zinnwaldite mineral group
Tabular stilbite on rock groundmass
Green apophyllite in stilbite groundmass
Kyanite
Asbestos sample
Pink beryl crystal, SEM
Tourmaline unworked stones
Sample of muscovite
Concentric banding in agate
Axinite
Beryl crystals
Scolecite mineral
Azurite on Chrysocolla substrate
Cut Scapolite round gemstone
Arsenopyrite
Zeolite crystal
Raw garnet crystal
Tourmaline crystal, thin section
Citrine crystal group
Tourmaline on quartz
Pallasite meteorite fragment
Quartz crystal, SEM
Apophyllite crystals
Blue labradorite
Zircon crystals on host rock
Citrine
Tourmaline
Rough pinkish-red Rubellite
Rare bright green Uvarovite Garnet
Staurolite, twinning cross
Almandine close
Malachite and chrysocolla minerals
Amethyst crystals
Scolecite crystals
Zeolite in quartz
Limburgite
Cavansite on mordenite
Chabazite crystals in quartz
Crocoite
Brochantite
Agate
Chalcedony
Wavellite
Analcime crystal group
Pyroxene crystal, thin section
Quartz crystals, SEM
Microcline mineral
Pink-white chabazite in basalt groundmass
Labradorite
Pectolite
Tourmaline cross section
Azurite crystals
Actinolite crystals with talc
Nephrite crystals
Titanite crystals in actinolite
Azurite in Limonite Groundmass
Azurite sample
Stilbite Crystal Gemstone
Basalt, light micrograph
Rose Quartz
Mesolite
Nagyagite
Calcite spherulites
Apophyllite on calcite
Limburgite, thin section micrograph
Fayalite
Gibbsite
Twinned augite crystals
Hornblende crystals
Smoky quartz
Grossular
Rhodonite
Calcite crystal
Pseudomorphic crystal growth
Calcite crystal rosettes
Aragonite crystals
Calcite crystals
Red calcite crystals
Brazilianite crystals in calcite
Cut and polished septarian nodule
Azurite crystals, SEM
Magnetite and calcite
Sample of feldspar
Lizardite in serpentine rock
Sapphire crystal
Malachite crystals, SEM
Apatite crystal
Stilbite and Heulandite
Ruby crystal and gems
Prismatic beryl crystal
Lapis lazuli crystals I
Lapis lazuli crystals II
Scapolite mineral sample
Scapolite crystals in rock groundmass
Lapis lazuli, SEM
Moss agate
Emerald
Gneiss with garnet, light micrograph
Gneiss with garnet
Stilbite
Sulphur crystal
Malachite & Azurite I
Malachite & Azurite II
Realgar and orpiment
Almandine crystals
Rutilated quartz
Azurite nodule
Azurite
Coral calcite crystals
Silver crystals in calcite
Aragonite crystals with sulphur
Flos-ferri aragonite
Calcite
Gypsum stone
Graphite on calcite crystals
Sylvanite crystals
Pink calcite crystals
Zincite in fraklinite
Quartz encrusted calcite crystals
Septarian nodule