Opal specimen and cut stone
Boulder opal formation
'Black' opal cabochon specimen
Opal mineral stone
Opal gemstones
Opal rock
Single piece of blue opal
Black opal gemstone
Opal
Opal specimen
Blue opal gemstones
Opal gem necklace
Opal gem and rock
Ironstone matrix with potch opal
Opal in its host rock
Potch opal with smooth and rough surface
Fire opal
Opal on bedrock
Opal specimens
Round polished Common Opal
Opal gemstone
Opalised fossil
Cut Fire Opal gemstone
Fire Opal
Opal surface
Mineral samples
Granite specimen
オパール
Fire opal birthstone
Rubellite tourmaline pendant
A cut and polished fire opal
Tourmaline specimen
Tourmaline crystal specimen
Three pieces of blue opal
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Schorl tourmaline crystal stone
Hawk's Eye quartz stone
Slice through fossilised wood revealing opal
Opal birthstone
Verdite green tourmaline gemstone
Polished and cut turquoise
Schorl and quartz crystals in groundmass
Elbaite mineral (tourmaline)
Tourmaline
Tourmaline crystals in quartz
Watermelon tourmaline
Elbaite mineral
Dravite mineral
Tourmaline crystal specimens
Allende meteorite specimen
Nephrite jade specimen
Bi-coloured tourmaline crystals
Black tourmaline in mica schist
Tourmaline gemstone
Asscher cut diamond gemstone
Tourmaline schorl specimen
Amethyst
Amethyst crystals
Uvarovite garnet crystals
Jadeite carved dish from China
Belt-hook carved in lapis lazuli
Orange sapphire gemstone
Topaz gemstone
Elbaite on albite and quartz
Tourmaline embedded in feldspar rock
Limburgite
Raw tourmaline crystal
Tourmaline gemstones and crystal
Tourmaline Pegmatite
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 pegmatite
Tourmaline gemstones in quartz
Blue tourmaline crystals
Obsidian specimen
蛋白石
Pink diamonds
Lapis lazuli specimen
Quartz types
Mylonite, light micrograph
Tourmaline crystals in quartzite
Tourmaline in quartz
Tourmaline 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
Schorl, the black variety of Tourmaline
Jade stone
Blue sapphire stone
Blue Sapphire uncut stone
Quartzite specimen
Cut Watermelon Tourmaline gemstone
Trillion cut tourmaline gemstone
Cut green Paraiba Tourmaline gemstone
Yellow-green Tourmaline rough
Graphic tourmaline, light micrograph
Trillion cut diamond
Pre-cut diamond forms
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
Citrine
Peridot
Nephrite crystals
Tremolite crystals
Moonstone gemstones
Garnet-bearing rock
Amethyst filled geode
Clinochlore with garnets
Garnet crystals on schist
Pyrargyrite crystals
Topaz specimens
Amethyst geode interior
Spessartine garnet
Garnet
Garnet gemstone
Illustrations of Indian diamonds
Topaz
Cursed amethyst
Grossular dodecahedral crystal
Andradite mineral
Demantoid
Uncut diamonds
Rubellite Tourmaline in Lepidolite Mica
Tiger eye
Quartz monzonite
Herkimer diamonds
Molybdenite specimen
Haematite specimen
Malachite mineral stone
Dendritic copper specimen
Beryl gem, cut stone
Uncut diamond from Africa
Large citrine gemstone