Topaz gemstone
Topaz specimens
Topaz crystal in albite and microcline
Topaz crystals
Orange sapphire gemstone
Quartz types
Unpolished topaz crystals
Amethyst
Amethyst crystals
Uvarovite garnet crystals
'Black' opal cabochon specimen
Rubellite tourmaline pendant
Topaz
Mystic topaz gemstone
Topaz gemstones
Citrine
Amethyst geode interior
Tourmaline crystal specimens
Large citrine gemstone
Diamond with garnet inclusion
Sherry Topaz
Tourmaline crystal specimen
Topaz gem
Garnet gemstone
Topaz, Minas Gerais, Brazil
Topaz or Beryl crystals
Crystal of imperial topaz
Opal
Boulder opal formation
Polished and cut turquoise
Allende meteorite specimen
Opal specimen and cut stone
Nephrite jade specimen
Belt-hook carved in lapis lazuli
Raw citrine crystal
Citrine gemstones and crystal
Quartz crystals coated with pink topaz crystals
Hemimorphite crystals
Sulphur crystals
Strontianite crystals
Gypsum crystals
Carved malachite column
Fluorite crystals
Tourmaline
Tourmaline crystals in quartz
Ruby
Nephrite crystals
Tremolite crystals
Blue sapphire stone
Blue Sapphire uncut stone
Opal gem necklace
Jade stone
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Hawk's Eye quartz stone
Schorl tourmaline crystal stone
Amethyst geode
Amethyst geodes
Amethyst filled geode
Clinochlore with garnets
Garnet crystals on schist
Pyrargyrite crystals
Spessartine garnet
Watermelon tourmaline
Crushed diamond, SEM
Grossular dodecahedral crystal
Elbaite mineral
Dravite mineral
Andradite mineral
Demantoid
Uncut diamonds
Emerald crystal, close up
Ironstone matrix with potch opal
Prismatic amethyst crystal
Olivine peridot crystal, close up
Heat-treated amethyst
Elbaite on albite and quartz
Mineral samples
Grossular garnet crystals on rock surface
Schorl and quartz crystals in groundmass
Tourmaline embedded in feldspar rock
Elbaite mineral (tourmaline)
Tourmaline gemstone
Cut pink Topaz gemstone
Granite specimen
Jadeite carved dish from China
Cut pink topaz gemstone
Citrine crystals
Carnelian gemstone
Peridot gemstone
Tiger Eye quartz gemstone
Avanturine smooth gemstone
Uncut diamond
Microdiamond crystal
Black tourmaline in mica schist
Cut diamond
Andradite crystals
Almandine mineral sample
Olivine mineral sample
Garnets in micaschist, light micrograph
Pyrope sand
Ruby crystal and gems
Fire opal
Sapphire crystal
Wollastonite with kolophonite
Opalised fossil
Grossular crystals in host rock
Rough emeralds
Almandine crystals in schist
Tourmaline crystals in quartzite
Emeralds
Peridotite
Garnet in peridotite
Amethyst and chalcedony
Lapis lazuli crystals
Tourmaline schorl specimen
Sapphire crystals in rock groundmass
Obsidian specimen
Asscher cut diamond gemstone
Citrine gemstone
Lapis lazuli specimen
Graphic tourmaline, light micrograph
Amethyst gemstones and crystal
Pallasite meteorite
Rare bright green Uvarovite Garnet
Green hemimorphite in groundmass
Rubies and sapphire
Citrine.
Raw aquamarine crystal
Azurite crystals
Quartz
Quartz crystals
Chalcopyrite and quartz crystals
Siderite mineral
Titanite bearing granite
Pseudomorphic crystal growth
Titanite crystals in actinolite
Quartz in sphalerite
Molybdenite in quartz monzonite
Colourful crystals
Quartz polished stone
Beryl gem, cut stone
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
Cabuchon gemstones of jasper
Egyptian jasper stone
Botswana agate stones
Round agate geode
Round agate thunderegg
Two agate thundereggs