Tourmaline gemstone
Verdite green tourmaline gemstone
Bi-coloured tourmaline crystals
Tourmaline gemstones in quartz
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Schorl tourmaline crystal stone
Opal gemstone
Hawk's Eye quartz stone
Fire opal birthstone
Black opal gemstone
Tourmaline
Tourmaline Pegmatite
Tourmaline gem
Tourmaline crystals
Tourmaline pegmatite
Tourmaline specimen
Watermelon tourmaline
Raw tourmaline crystal
Tourmaline gemstones and crystal
Elbaite mineral (tourmaline)
Tourmaline gem, 365 carat
Tourmaline crystals in matrix
Elbaite crystal, variety Tourmaline
Albite with Tourmaline
Tourmaline crystals on Albite
Tourmaline crystals in quartz
Blue tourmaline crystals
Schorl variety of Tourmaline, Namibia
Opal mineral stone
Opal rock
Topaz gemstone
Alexandrite stone
Sapphire gemstone
Aquamarine gemstone
Turquoise stone
Tourmaline gemstones
Tourmaline quartz
Tourmaline crystal
Tourmaline in quartz
Tourmaline mica in slate
Tourmaline in gneiss rock
Black tourmaline in mica schist
Quartz and green tourmaline crystals
Pink tourmaline crystals growing on mica
Tourmaline Crystals, Minas Gerais, Brazil
Green Tourmaline in Muscovite, Maine
Chrysoberyl yellow beryllium gemstone
Schorl and quartz crystals in groundmass
Elbaite mineral
Dravite mineral
Opal birthstone
Tourmaline mineral, light micrograph
紅電気石
Schorl, the black variety of Tourmaline
Crystals of green toumaline and pink lepidolite
電気石
Granitic pegmatite
Opal gemstones
Single piece of blue opal
Cut Watermelon Tourmaline gemstone
Trillion cut tourmaline gemstone
Cut green Paraiba Tourmaline gemstone
Orthoclase adenoma moonstone gemstone
Tourmaline crystals in quartzite
Yellow-green Tourmaline rough
Rubellite tourmaline pendant
Tourmaline crystal specimen
Tourmaline crystal specimens
Tourmaline embedded in feldspar rock
Rubellite Tourmaline in Lepidolite Mica
Rubellite I
Rubellite II
Polarized light experiments, 1847
Blue opal gemstones
Moonstone gemstones
Tourmaline crystal, thin section
Black tourmaline, SEM
Elbaite on albite and quartz
Granite specimen
Opal
Opal gem necklace
オパール
Peridot gemstones
Amethyst gemstones
Topaz gemstones
Turquoise gemstones
Garnet gemstones
Emerald gemstones
Cut green Tourmaline gemstone
Graphic tourmaline, light micrograph
Mylonite, light micrograph
A diamond
Opal specimen
Amethyst quartz birthstone
Citrine quartz birthstone
ベージュの布上に置かれた花をモチーフにしたブローチ
Luxulyanite, thin section, LM
Schorl (black Toutmaline)
2つのダイヤモンド
Tourmaline schorl specimen
Peridot gemstone
Demantoid garnet gemstone
Opal specimens
Opal in its host rock
Opal on bedrock
Assorted jewels
Precious gemstones
Ironstone matrix with potch opal
Potch opal with smooth and rough surface
Round polished Common Opal
Opal gem and rock
Ruby in tweezers, studio shot
Emerald in tweezers, studio shot
Jewel in tweezers, studio shot
蛋白石
Cut Diamond with Colour Refractions
Sapphire gemstones
Tourmaline cross section
Tourmaline on quartz
Opalised fossil
Fire opal
Opal surface
Large diamond in box
Pink Diamonds
Single large diamond, close-up (still life)
Tweezers holding diamond, close-up
Ruby gemstones
Rough pinkish-red Rubellite
Diamond gemstones
Boulder opal formation
Opal specimen and cut stone
Lazurite birthstone
Gem
ダイヤモンド
Diamond, side view, studio shot
Diamond, studio shot
Diamond reflected on black surface
Diamond
A cut and polished fire opal
Three pieces of blue opal
Slice through fossilised wood revealing opal
Cut Fire Opal gemstone
Malachite mineral stone
Cut Indicolite gemstone
Fire Opal
Mineral samples
Diamonds on red velvet, elevated view