Opal on bedrock
Opal gemstones
Opal rock
Single piece of blue opal
Black opal gemstone
Opal in its host rock
Blue opal gemstones
Opal mineral stone
Fire opal
Opal
Opal gem and rock
Opal gem necklace
Ironstone matrix with potch opal
Potch opal with smooth and rough surface
Opalised fossil
Opal gemstone
Boulder opal formation
Opal surface
Opal specimen and cut stone
Round polished Common Opal
Opal specimen
Opal specimens
Fire Opal
'Black' opal cabochon specimen
オパール
Mineral samples
Cut Fire Opal gemstone
Fire opal birthstone
蛋白石
A cut and polished fire opal
Slice through fossilised wood revealing opal
Opal birthstone
Three pieces of blue opal
Verdite green tourmaline gemstone
Black tourmaline in mica schist
Tourmaline
Watermelon tourmaline
Dravite mineral
Tourmaline crystals in quartz
Schorl and quartz crystals in groundmass
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Hawk's Eye quartz stone
Schorl tourmaline crystal stone
Tourmaline gemstone
Bi-coloured tourmaline crystals
Tourmaline specimen
Elbaite mineral
Elbaite mineral (tourmaline)
Tremolite crystals
Tourmaline crystals on Albite
Tourmaline crystals in quartzite
Asscher cut diamond gemstone
Pink diamonds
Limburgite
Pink tourmaline crystals growing on mica
Tourmaline in quartz
Tourmaline gem
Tourmaline crystals in matrix
Elbaite crystal, variety Tourmaline
Schorl variety of Tourmaline, Namibia
Tourmaline crystals
Albite with Tourmaline
Tourmaline mica in slate
Tourmaline in gneiss rock
Tourmaline gemstones
Tourmaline quartz
Tourmaline pegmatite
Tourmaline Pegmatite
Galenite and quartz crystals
Quartz boulder
Brecciated quartz
Nephrite crystals
Moonstone gemstones
Grossular crystals in host rock
Rough emeralds
Turquoise mineral
Pyrargyrite crystals
Raw tourmaline crystal
Tourmaline gemstones and crystal
Tourmaline gem, 365 carat
Tourmaline crystal
Blue tourmaline crystals
Quartz and green tourmaline crystals
Crystals of green toumaline and pink lepidolite
Tourmaline gemstones in quartz
Elbaite on albite and quartz
Granite specimen
Tourmaline crystal specimen
Tourmaline crystal specimens
Mylonite, light micrograph
紅電気石
電気石
Tourmaline Crystals, Minas Gerais, Brazil
Green Tourmaline in Muscovite, Maine
Tourmaline mineral, light micrograph
Lapis lazuli
Jade sword handle
Diamond processing, Siberia, Russia
Turquoise on rock surface, close-up
Garnet crystals on schist
Uncut diamonds
Cuprocassiterite in quartz mica schist
Pyrolusite in quartz
Rubellite tourmaline pendant
Tourmaline embedded in feldspar rock
Granitic pegmatite
Graphic tourmaline, light micrograph
Rough emerald
Rough diamond
Schorl, the black variety of Tourmaline
Jasper
Quartz monzonite
Herkimer diamonds
Jasper breccia rock
Grossular garnet crystals on rock surface
Sample of Labradorite
Andradite crystals
Almandine mineral sample
Olivine mineral sample
Agate in amethyst
Topaz crystals
Pyrope sand
Garnet-bearing rock
Amethyst filled geode
Mineral exploration drilling, Kenya
Diamond drill bit
Mining core samples, Kenya
Topaz specimens
Almandine crystals in schist
Spessartine garnet
Illustrations of Indian diamonds
Topaz
Cursed amethyst
Andradite mineral
Demantoid
Pre-cut diamond forms
Peridotite
Garnet in peridotite
Amethyst and chalcedony
Topaz crystal in albite and microcline
Emerald crystal, close up
Gneiss with garnet
Jade stone
Opal Bivalve fossil Coober Pedy Australia
Magnetite in quartz