Sapphire, SEM
Sapphire crystal
Rubies and sapphire
Ruby
Synthetic gemstones
Sapphire crystals in rock groundmass
Ruby crystals, SEM
Ruby and sapphire specimens
Sapphire ring
Blue sapphire stone
Blue Sapphire uncut stone
Orange sapphire gemstone
Sapphire gemstones
Sapphires
Ruby quartz
Azurite crystals, SEM
Malachite crystals, SEM
Pink beryl crystal, SEM
Ruby crystal and gems
Sample of sapphire
Large ruby slice
Magnetite, SEM
Precious gemstones
Quartz crystals, SEM
Chalcopyrite, SEM
Quartz crystal, SEM
Crystalline manganese, SEM
Sea salt crystals, SEM
Ruby in zoisite
Sapphire gemstone
Yellow sapphire
Hydrated copper sulphate crystals, SEM
Oval cut purple sapphire gemstone
Almandine crystals
Haematite, SEM
Sapphire Crystal Gemstone
Cut Sapphire gemstone
Cut yellow sapphire gemstone
Gemstones and light dispersion
Emerald cut ruby gemstone
Blue rectangular gemstone
Synthetic ruby
Sapphire mining, Madagascar
Sapphire, Sri Lanka, 288 carat
Barite crystals, SEM
Microdiamond crystal
Watch Movement, SEM
Matildite crystals, SEM
Pyrargyrite crystals
Copper oxide crystals, SEM
Crushed diamond, SEM
Jewellery with gemstones and diamonds
Calcium carbonate crystals, SEM
Manganese oxide, dendritic form
Colourful gemstones
Rubies
Basaltic dyke, polarised light micrograph
Diamond in host rock
Beryl crystals
Cut sapphire
Nickel dendrites, SEM
Sapphire gravel recovered from a stream
Rose quartz crystals, SEM
Natural copper crystal, SEM
First laser
Theodore Maiman, American physicist
Microdiamond crystal, SEM
Sugar crystals, SEM
Fluorapatite crystal, SEM
Pyrolusite in quartz
Dendritic mineral crystals
Ironstone matrix with potch opal
Franklinitein calcite groundmass
Amethyst
Dendritic mineralisations in chalcedony
Hematite crystals
Gas hydrate crystals, SEM
Clinochlore
Chromite
Fluorite crystals
Kyanite mineral
Prehnite and okenite minerals
Calcium carbonate crystal, SEM
Zinc oxide crystals, SEM
Graphite
Coccolithophore shell, SEM
Coccolithophore, SEM
Ruby gemstones
Geode, thin section micrograph
Mica schist folds, polarised light LM
Opalised fossil
Fire agate
Blue labradorite
YELLOWSTONE: HOT SPRING.
Precipitated gold crystals, SEM
Salt crystals, SEM
Molten and recrystallised metal, SEM
Iron pyrite crystal, SEM
Microdiamond, SEM