Axinite
Axinite crystals
Red-brown axinite in rock groundmass
Tiger eye
Fluorite
Carnelian agate
Cut and polished jasper
Azurite crystals
Quartz
Tourmaline
Baryte
Axinite mineral specimen
Citrine
Sample of limestone
Sample of granite
Sample of sandstone
Sample of basalt
Microcline mineral
Cuprite octahedral crystal
Breccia Sanguigna marble
Breccia Coallina Rosa marble
Galena
Enargite mineral
Blue lace agate
Arsenic
Beryl
Pyromorphite
Mimetite mineral
Plumbogummite mineral
Astrophyllite mineral
Adamite mineral
Picromerite mineral
Cuprite twinned crystals
Sample of shale
Galenite crystals
Sample of chalk
Brookite
Antimony
Sample of clay
Wulfenite mineral
Amethyst
Stibnite crystals
Descloizite
Monazite mineral
Diorite intruded by microgranite
Variscite specimen
Germanium, macrophotograph
Aluminium
Meteorite
The Stannern achondrite
The Nakhla meteorite
Macrophotograph of high purity cobalt
Native copper
Native gold
Native silver
Ruby
Zincite specimen
Plume agate
Agate
Sweet home agate
Condor agate
Fluorite crystals
Pyrite
Cleaved calcite rhombs, close-up
Hypersthene, close-up
Banded flint
Wardite specimen
Crystal Healing Stone Axinite
Fossil fern trunk
Rough emerald
Amber
Borax crystals, SEM
Boron salt crystals, SEM
Dioptase crystals
Sample of rose quartz
Labradorite
Malachite
Sodalite
Campo del Cielo meteorite fragment
Quartz monzonite
Fairburn agate
Union road agate
Lysite agate
Lake Superior agate
Paint rock agate
Paul Bunyon plume agate
Siam Siding agate
Fourth of July Butte agate
Pompon agate
Blue Bed thunder egg agate
Priday plume agate
Antelope 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
Thulite mineral
Berzeliite mineral
Twinned staurolite crystals
Clinochlore
Blue John specimen
Variety of tektites
Morganite
Scolecite mineral
Selenite crystals
Herkimer diamonds
Baryte crystals
Larimar Pectolite
Prismatic beryl crystal
Blue Cavansite rosette in rock groundmass
Yellow cancrinite in syenite
Botryoidal chalcedony, close-up
Cordierite crystals in rock groundmass
Kenyte lava
Basalt bomb
Agatised coral
1888 colour lithograph of minerals
Kyanite mineral
Aragonite crystals
Baryte resting on sphalerite
Flos ferri aragonite in rock groundmass
Prehnite epimorph after laumontite
Chelyabinsk meteorite fragment
Blue John vase
Storage of fossil specimens
Dioptase mineral sample
Neodymium
Pyrite crystals
Apatite crystal
Jasper
Malachite mineral sample
Cobalt calcite mineral sample
Selenite mineral sample
Iris agate
Moss agate
Regency rose agate
Coyamito agate
Bubble lace agate
Twinned fluorite crystals
Chromite
Uraninite in calcite
Malachite-based mineral deposit
calcite veining in limestone
Apatite crystals