Pink beryl crystal, SEM
Quartz crystal, SEM
Quartz crystals, SEM
Beryl crystals
Malachite crystals, SEM
Hydrated copper sulphate crystals, SEM
Chalcopyrite, SEM
Sapphire, SEM
Azurite crystals, SEM
Tourmaline crystal, thin section
Concentric banding in agate
Axinite
Chrysocolla mineral
Quartz coated with silica
Lapis lazuli, SEM
Crystalline manganese, SEM
Sea salt crystals, SEM
Prismatic beryl crystal
Agate
Chalcedony
Fluorapatite crystal, SEM
Apophyllite crystals
Almandine
Raw garnet crystal
Pallasite meteorite fragment
Calcium carbonate crystals, SEM
Stilbite crystal group
Calcium carbonate crystal, SEM
Tourmaline
Tourmaline on quartz
Rough pinkish-red Rubellite
Rare bright green Uvarovite Garnet
Zircon crystals on host rock
Citrine
Kyanite
Magnetite, SEM
Emerald
Microdiamond crystal
Apophyllite on calcite
Tourmaline unworked stones
Prehnite and okenite
Malachite and chrysocolla minerals
Citrine crystal group
Zinc oxide crystals, SEM
Twinned augite crystals
Hornblende crystals
Ruby in zoisite
Zinnwaldite mineral group
Pyroxene crystal, thin section
Black tourmaline, SEM
Pseudomorphic crystal growth
Feldspar and quartz
Rose Quartz
Emerald crystal in quartz
Gneiss with garnet, light micrograph
Ruby crystals, SEM
Tourmaline cross section
Beryl gem, cut stone
Scolecite
Fractured fluorapatite crystal, SEM
Fluorapatite crystal surface, SEM
Microcline mineral
Smoky quartz
Quartz encrusted calcite crystals
Septarian nodule
Aragonite crystals
Sodium nitrate crystal, SEM
Calcite crystal
Edge of a brushite crystal, STEM
Sample of feldspar
Lizardite in serpentine rock
Beryl in rock groundmass, close-up
Calcite crystal rosettes
Haematite, SEM
Sugar crystals, SEM
Copper sulphate crystal
Fluorite mineral
Coral sand sample, SEM
Gas hydrate crystals, SEM
Emerald in quartz
Rough emeralds
Uncut emeralds
Barite crystals, SEM
Moss agate
Sample of muscovite
Gneiss with garnet
Blue labradorite
Concrete, ESEM
Amethyst crystals
Nickel dendrites, SEM
Raw aquamarine crystal
Emerald crystal, close up
Matildite crystals, SEM
Asbestos sample
Fayalite
Micrometeorite, SEM
Titanium dioxide particles, SEM
Rutilated quartz
Cut Watermelon Tourmaline gemstone
Salt crystals, SEM
Fluorapatite crystals, SEM
Natural copper crystal, SEM
Brushite crystals, SEM
Calcium phosphate crystals, SEM
Octacalciumphosphate crytals, SEM
Calcium phosphate precipitate, SEM
Apatite crystals, SEM
Sodium phosphate crystals, SEM
Cut Scapolite round gemstone
Rhodonite
Rose quartz crystals, SEM