Fayalite
Pallasite meteorite fragment
Basalt, light micrograph
Axinite
Olivine peridot crystal, close up
Basaltic dyke, polarised light micrograph
Martian soil sample, X-ray diffraction analysis
Olivine mineral sample
Limburgite
Concentric banding in agate
Almandine
Tourmaline on quartz
Prehnite and okenite
Tourmaline unworked stones
Agate
Chalcedony
Asbestos veins in serpentinite
Meteorite DHO 020-H4_5 Dhofar Oman, LM
Pallasite meteorite
Meteorite Brenham, light micrograph
Meteorite NWA 2957, light micrograph
Meteorite Al Mahbas, light micrograph
Meteorite Fukang China, light micrograph
Meteorite NWA 6435, light micrograph
Gabbro microcrystals, light micrograph
Barred olivine chondrule
Zinnwaldite mineral group
Peridot gemstone
Polarised LM of thin section of gabbro
Chrysocolla mineral
Beryl crystals
Pink beryl crystal, SEM
Citrine crystal group
Asbestos sample
Quartz coated with silica
Stilbite crystal group
Cut Scapolite round gemstone
Rough pinkish-red Rubellite
Rare bright green Uvarovite Garnet
Tourmaline cross section
Tourmaline
Citrine
Ruby in zoisite
Zircon crystals on host rock
Rhodonite
Apophyllite crystals
LM of a thin section of gabbro rock
Raw garnet crystal
Tourmaline crystal, thin section
Amethyst crystals
Seymchan pallasite
Peridotite, polarised light micrograph
Olivine-rich lava
Peridot
Garnet
Kimberlite rock, light micrograph
Staurolite, twinning cross
Quartz crystals, SEM
Quartz crystal, SEM
Chabazite
Rose Quartz
Kyanite
Komatitite rock, light micrograph
Peridotite rock, light micrograph
Lapis lazuli, SEM
Emerald
Gneiss with garnet, light micrograph
Gneiss with garnet
Cut pink topaz gemstone
Lapis lazuli crystals I
Lapis lazuli crystals II
Malachite and chrysocolla minerals
Sphalerite on strontianite
Smoky quartz
Twinned augite crystals
Magnesite vein in igneous rock
Weathered boulder in Antarctica, 1912
Gale Crater, Mars, satellite image
Peridot gemstones
Peridot pebble and mixed-cut peridot
Cut Peridot gemstone
Beryl stone
Feldspar and quartz
Round cut peridot
Trillion cut peridot
Oval cut peridot
Peridot, Pakistan, 129 Carat
Pallasite, meteorite
Martian surface, infrared MRO image
Gneiss, thin section, polarised LM
Lherzolite rock, light micrograph
Gabbro rock, light micrograph
Pyroxenite rock, light micrograph
Dunite rock, light micrograph
Olivine flakes, light micrograph
Native gold on quartz
Lizardite in serpentine rock
Sample of feldspar
Apophyllite on calcite
Moss agate
Sample of muscovite
Colourful gemstones
Cut green Tourmaline gemstone
Cut Indicolite gemstone
Cut Cordierite (Iolite) gemstone
Cut Kyanite gemstone
Cut Pyrope gemstone
Cut Scapolite gemstone
Cut Spessartine gemstone
Cut Watermelon Tourmaline gemstone
Yellow-green Tourmaline rough
Trillion cut tourmaline gemstone
Cut green Paraiba Tourmaline gemstone
Cut pink Topaz gemstone
Labradorite
Blue labradorite
Beryl gem, cut stone
Calcite crystal
Calcite
Sylvanite crystals
Rutilated quartz
Quartz encrusted calcite crystals
Bismuthinite
Cassiterite tin ore
Scolecite
Hornblende crystals
Microcline mineral
Pyroxene crystal, thin section
Libethenite mineral
Septarian nodule
Quartz and pyrite
Pyrite on quartz
Yellow crystal
Fire Opal
Black tourmaline, SEM
Scapolite crystals in rock groundmass
Scapolite mineral sample
Container of the food additive E553a
Chromite and serpentine
Microdiamond crystal
Wulfenite
Precious gemstones