Descloizite
Sample of granite
Sample of sandstone
Sample of basalt
Quartz
Kenyte lava
Diorite intruded by microgranite
Basalt bomb
Tiger eye
Axinite
Azurite crystals
Carnelian agate
Cut and polished jasper
Tourmaline
Fossil fern trunk
Storage of fossil specimens
Sample of limestone
Fluorite
Rough emerald
Sample of shale
Citrine
Homo sapiens skull comparison
Zincite specimen
Native gold
Sample of clay
Fossil Sphenophyllum plant
Gymnosperm fossil
Fossil conifer leaf
Fossil leaf
Fossil fern frond
Fossil cycad leaves
Wardite specimen
Variscite specimen
Baryte
Microcline mineral
Blue lace agate
Sample of chalk
Fossil torvosaurus dinosaur claw
Amber
Galenite crystals
Fish fossils
Ammonite fossils
Fossil Calamites leaves
Breccia Sanguigna marble
Breccia Coallina Rosa marble
Lodestone with nails attrackted
Fish fossil
Fish fossil head
Arsenic
Beryl
Pyromorphite
Mimetite mineral
Plumbogummite mineral
Astrophyllite mineral
Adamite mineral
Picromerite mineral
Cuprite twinned crystals
Macrophotograph of high purity cobalt
Olivenite specimen
Turquoise mineral
Silicified pine cone
Galena
Enargite mineral
Amber research, amber immersed in water
Amethyst
Fossil museum
Germanium, macrophotograph
Aluminium
Cuprite octahedral crystal
Fossil maple leaf
Wulfenite mineral
Tetrahedrite specimen
Chelyabinsk meteorite fragment
Fossilised conifer wood
Specimen preparation
Jewel beetles
Antimony
Willemite
Iron ore
Native Lead
Fibrous Goethite, Germany
Patronite, an ore of Vanadium
Bauxite, an ore of Aluminum
Wolframite ore of Tungsten
Clinochlore
Fluorite crystals
Seed fern fossil
Opal specimen
Fossil Rhus stellariaefolia leaf
Dapedium orbicularis, fish fossil
Torvosaurus dinosaur, fossil claw
Opal specimens
Irish elk head
Wasp wing, fossil specimen
Wulfenite crystals
Fossil fern fronds
Lodestone
Brookite
Palaeocoma egertoni, brittle star fossil
Fossil crinoids
Sea urchin fossils
Sea urchin fossil
Manganese
Turquoise specimen and polished stone
Credneria triacuminata, leaf fossil
Athleta luctator, sea snail fossil
Fossil ammonite
Chromite
Uraninite in calcite
Native copper, macrophotograph
Quartz boulder
Banded iron ore
Brecciated quartz
Synthetic spinel
Prehnite and okenite minerals
Native copper
Adamite crystals
Granular celsian
Moss agate pin tray
Almandine crystal in schist
Danburite crystal
Short, prismatic phosgenite crystals in rock groundmass
Tree calcite
Lilac jadeite
Braunite crystal
Massive triplite
Green nontronite
Massive chalcocite
Massive rock gypsum
Pigeonite crystal
Illite
Sand calcite
Massive covellite showing purple iridescence
Group of azurite crystals
Zircon crystals in a feldspar and biotite matrix
Glaucophane with fuchsite, rutile, pyrite
Staurolite crystals
Acicular brochantite crystals in groundmass of iron oxide
Prismic gadolinite crystal
Tuff rock with graded bedding
Rose clinozoisite with thulite
Dufrenite on goethite
Willemite and calcite
Single gypsum crystal
Montmorillonite crystals in bentonite
Lonsdaleia, coral fossil
Lithostrotion, coral fossil
Trigona, bivalve fossils
Cyclophthalmus senior, insect fossil
Fossilised seed fern seeds
Sulphur crystals
Ruby
Camarotoechi, brachiopod fossils
Pentacrinites, crinoid fossil
Trinucleus, trilobite fossil
Meteorite
The Stannern achondrite
The Nakhla meteorite
Sharovisaurus karatauensis, lizard fossil
Stibnite crystals
Diamond specimen
Magnetite
Hornblende-biotite granite
Neuropteris, seed fern fossil
Glossopteris, fern fossil
Lepidodendron, tree trunk fossil
Wood tin
Blood sample
Iron and sulphur
Sulphur
Iron II Sulphide with hazard pictogram
Iron II Sulphide on watch glass