Boulder opal formation
Opal specimen and cut stone
'Black' opal cabochon specimen
Opal gemstones
Opal rock
Single piece of blue opal
Opal mineral stone
Black opal gemstone
Opal
Blue opal gemstones
Opal gem necklace
Opal gem and rock
Opal in its host rock
Ironstone matrix with potch opal
Potch opal with smooth and rough surface
Opal specimen
Fire opal
Opal on bedrock
Opal specimens
Round polished Common Opal
Opal gemstone
Opalised fossil
Opal surface
Fire Opal
Mineral samples
Cut Fire Opal gemstone
オパール
Fire opal birthstone
Granite specimen
Rubellite tourmaline pendant
Three pieces of blue opal
A cut and polished fire opal
Slice through fossilised wood revealing opal
Tourmaline crystal specimens
Opal birthstone
Verdite green tourmaline gemstone
Tourmaline
Tourmaline crystals in quartz
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Hawk's Eye quartz stone
Schorl tourmaline crystal stone
Tourmaline specimen
Watermelon tourmaline
Elbaite mineral
Dravite mineral
Schorl and quartz crystals in groundmass
Elbaite mineral (tourmaline)
Polished and cut turquoise
Tourmaline crystal specimen
Bi-coloured tourmaline crystals
Black tourmaline in mica schist
Amethyst
Allende meteorite specimen
Amethyst crystals
Uvarovite garnet crystals
Nephrite jade specimen
Belt-hook carved in lapis lazuli
Orange sapphire gemstone
Topaz gemstone
Tourmaline gemstone
Jadeite carved dish from China
Elbaite on albite and quartz
Tourmaline embedded in feldspar rock
Limburgite
Raw tourmaline crystal
Tourmaline gemstones and crystal
Tourmaline gem, 365 carat
Tourmaline gem
Tourmaline crystals in matrix
Tourmaline Crystals, Minas Gerais, Brazil
Elbaite crystal, variety Tourmaline
Schorl variety of Tourmaline, Namibia
Tourmaline crystals
Green Tourmaline in Muscovite, Maine
Albite with Tourmaline
Tourmaline crystals on Albite
Tourmaline gemstones in quartz
Blue tourmaline crystals
Tourmaline pegmatite
Tourmaline Pegmatite
蛋白石
Asscher cut diamond gemstone
Pink diamonds
Quartz types
Tourmaline crystals in quartzite
Mylonite, light micrograph
Tourmaline in quartz
Tourmaline mineral, light micrograph
Tourmaline mica in slate
Tourmaline crystal
Tourmaline in gneiss rock
Pink tourmaline crystals growing on mica
Quartz and green tourmaline crystals
Crystals of green toumaline and pink lepidolite
Tourmaline gemstones
Tourmaline quartz
Schorl, the black variety of Tourmaline
Tourmaline schorl specimen
Obsidian specimen
Quartz boulder
Lapis lazuli specimen
Yellow-green Tourmaline rough
Graphic tourmaline, light micrograph
Amethyst geode interior
Large citrine gemstone
Quartzite specimen
Citrine
Peridot
Nephrite crystals
Tremolite crystals
Moonstone gemstones
Blue sapphire stone
Blue Sapphire uncut stone
Garnet-bearing rock
Jade stone
Amethyst filled geode
Clinochlore with garnets
Garnet crystals on schist
Pyrargyrite crystals
Topaz specimens
Spessartine garnet
Garnet
Garnet gemstone
Illustrations of Indian diamonds
Topaz
Cursed amethyst
Grossular dodecahedral crystal
Andradite mineral
Demantoid
Uncut diamonds
Topaz crystal in albite and microcline
Emerald crystal, close up
Imperial Jade streaked with green
Prismatic amethyst crystal
Olivine peridot crystal, close up
Grossular garnet crystals on rock surface
Turquoise on rock surface, close-up
Five polished ruby gemstones
Diamond with garnet inclusion
Tiger's eye and Hawk's eye gemstones
Rubellite Tourmaline in Lepidolite Mica
Tiger eye
Quartz monzonite
Herkimer diamonds
Uncut diamond from Africa
Diamond theft reward poster, April 1965
Cut Watermelon Tourmaline gemstone
Trillion cut tourmaline gemstone
Cut green Paraiba Tourmaline gemstone
Opal Bivalve fossil Coober Pedy Australia
Trillion cut diamond