Turquoise mineral
Turquoise stones
Turquoise gemstones
Turquoise gemstone
Polished turquoise stone
Turquoise specimen and polished stone
Turquoise
Turquoise embedded in iron oxide
Tarquoise.
Turquoise stone
Green hemimorphite in groundmass
Polished and cut turquoise
Turquoise on rock surface, close-up
Turquoise stone set in gold ring
Turquoise Crystal Gemstone
Amazonite mineral
Lazurite crystals in a matrix of calcite
Lapis lazuli crystals
割れたトラバーチンにディスプレーされたアクセサリー
blue apatite
Lapis lazuli specimen
Necklace of lapis lazuli
Polished lapis lazuli stone
Lapis lazuli crystals I
Lapis lazuli crystals II
Lazurite
Lapis lazuli
Lapis lazuli, a rare, deep blue gemstone
Diamonds
Tourmaline
Lapis lazuli, SEM
Belt-hook carved in lapis lazuli
Amethyst geode
Rubies and sapphire
Ruby
Diamond
Chalcopyrite and quartz crystals
Cuprocassiterite in quartz mica schist
Mineral samples
Elbaite mineral
Dravite mineral
Andradite mineral
Elbaite mineral (tourmaline)
Almandine mineral sample
Olivine mineral sample
Herkimer diamonds of quartz mineral
Diamond gemstones
Opalised fossil
Amethyst crystals
Uncut diamond
Topaz specimens
Tourmaline crystals in quartz
Blue sapphire stone
Blue Sapphire uncut stone
Indicolite tourmaline faceted stone
Sapphire crystal
Sample of sapphire
Komatitite rock, light micrograph
Peridotite rock, light micrograph
Almandine
Large ruby slice
Raw amethyst crystal
Raw citrine crystal
Raw garnet crystal
Raw tourmaline crystal
Tourmaline gemstones and crystal
Topaz crystal in albite and microcline
Emerald crystal, close up
Ironstone matrix with potch opal
Prismatic amethyst crystal
Mass of prismatic aquamarine crystals
Mass of pyramid-shaped amethyst crystals
Olivine peridot crystal, close up
Heat-treated amethyst
Elbaite on albite and quartz
Single amethyst crystal, close up
Grossular garnet crystals on rock surface
Schorl and quartz crystals in groundmass
Peridot gemstone
Tourmaline Pegmatite
Tourmaline embedded in feldspar rock
Tourmaline in quartz
Andradite, New Jersey
Microdiamond crystal
Unpolished topaz crystals
Tourmaline quartz
Calcite on amethyst
Amethyst
Opal
Citrine
Black tourmaline in mica schist
Diamond with garnet inclusion
Tourmaline crystal, thin section
Citrine crystals
Cut diamond
Cut and polished diamonds
Andradite crystals
Garnets in micaschist, light micrograph
Nephrite crystals
Tremolite crystals
Topaz crystals
Pyrope sand
Opal gem necklace
Jade stone
Watermelon tourmaline crystalline stone
Hawk's Eye quartz stone
Schorl tourmaline crystal stone
Amethyst geodes
Garnet gemstone
Amethyst filled geode
Clinochlore with garnets
Ruby crystal and gems
Garnet crystals on schist
Rubellite tourmaline pendant
Uvarovite garnet crystals
Fire opal
'Black' opal cabochon specimen
Orange sapphire gemstone
Topaz gemstone
Wollastonite with kolophonite
Pyrargyrite crystals
Grossular crystals in host rock
Rough emeralds
Almandine crystals in schist
Tourmaline crystals in quartzite
Amethyst geode interior
Tourmaline crystal specimen
Tourmaline crystal specimens
Spessartine garnet
Watermelon tourmaline
Crushed diamond, SEM
Grossular dodecahedral crystal
Demantoid
Emeralds
Uncut diamonds
Amethyst crystals, light micrograph
Deformation of garnet crystal
Tourmaline crystal
Peridotite
Garnet in peridotite
Tourmaline in gneiss rock
Aquamarine crystals