Topaz crystals
Topaz specimens
Topaz crystal in albite and microcline
Topaz gemstone
Topaz
Topaz gemstones
Unpolished topaz crystals
Citrine
Andradite crystals
Nephrite crystals
Pyrargyrite crystals
Topaz or Beryl crystals
Almandine crystals in schist
Tourmaline crystals in quartz
Garnet crystals on schist
Grossular crystals in host rock
Quartz crystals coated with pink topaz crystals
Schorl and quartz crystals in groundmass
Sherry Topaz
Citrine crystals
Topaz gem
Grossular garnet crystals on rock surface
Tremolite crystals
Topaz, Minas Gerais, Brazil
Black tourmaline in mica schist
Almandine mineral sample
Olivine mineral sample
Pyrope sand
Amethyst filled geode
Fire opal
Rough emeralds
Tourmaline
Spessartine garnet
Watermelon tourmaline
Dravite mineral
Andradite mineral
Demantoid
Uncut diamonds
Peridotite
Garnet in peridotite
Amethyst and chalcedony
Emerald crystal, close up
Ironstone matrix with potch opal
Opal gem necklace
Jade stone
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Hawk's Eye quartz stone
Schorl tourmaline crystal stone
Crystal of imperial topaz
Garnet gemstone
Amethyst geode interior
Grossular dodecahedral crystal
Elbaite mineral
Prismatic amethyst crystal
Olivine peridot crystal, close up
Elbaite mineral (tourmaline)
Lapis lazuli crystals
Quartz crystals
Colourful crystals
Uncut diamond
Clinochlore with garnets
Ruby crystal and gems
Opalised fossil
Amethyst
Smoky quartz crystals
Galenite and quartz crystals
Chabazite crystals in quartz
Orthoclase and quartz crystals
Blue sapphire stone
Blue Sapphire uncut stone
Raw citrine crystal
Sphene crystals in groundmass, close-up
Quartz types
Amethyst crystals
Azurite crystals
Titanite crystals in actinolite
Quartz encrusted calcite crystals
Emeralds
Asscher cut diamond gemstone
Pink diamonds
First laser
Pallasite meteorite
Tourmaline gemstone
Uvarovite garnet crystals
Tourmaline crystals in quartzite
Garnets in micaschist, light micrograph
Crushed diamond, SEM
Amethyst geode
Heat-treated amethyst
Crystals of haematite in quartz
Cordierite crystal
Quartz
Native gold
Iron oxide precipitation in agate
Cuprocassiterite in quartz mica schist
Siderite mineral
Titanite bearing granite
Pseudomorphic crystal growth
Molybdenite in quartz monzonite
Rose quartz mineral, artwork
Prasiolite mineral
Zeolite in quartz
Pyrolusite in quartz
Beryl gem, cut stone
Dyed agate slice
Amethyst stone
Chiastolite stone
Tellurium in quartz
Hessite in quartz
Cut and polished agate
Native gold on quartz
Silica rock crystal samples
Glacial sand deposit
Graphic granite rock
Granite
Quartz polished stone
Tiger Eye quartz gemstone
Avanturine smooth gemstone
Egyptian jasper stone
Round agate geode
Round agate thunderegg
Two agate thundereggs
Agate slice
Blue lace agate
Botswana agate stone
Quartz filled concretion
Amethyst crystals, light micrograph
Mass of prismatic aquamarine crystals
Lazurite crystals in a matrix of calcite
Mystic topaz gemstone
Citrine.
Aquamarine crystals