Tourmaline gemstones
Verdite green tourmaline gemstone
Bi-coloured tourmaline crystals
Tourmaline gemstone
Tourmaline
Tourmaline gemstones and crystal
Tourmaline crystals in quartz
Tourmaline crystals
Tourmaline crystals in matrix
Elbaite crystal, variety Tourmaline
Tourmaline gemstones in quartz
Schorl variety of Tourmaline, Namibia
Tourmaline specimen
Tourmaline gem
Watermelon tourmaline
Tourmaline quartz
Tourmaline pegmatite
Tourmaline Pegmatite
Opal gemstones
Raw tourmaline crystal
Elbaite mineral (tourmaline)
Tourmaline in quartz
Albite with Tourmaline
Tourmaline crystals on Albite
Tourmaline mica in slate
Tourmaline in gneiss rock
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Schorl tourmaline crystal stone
Black tourmaline in mica schist
Tourmaline Crystals, Minas Gerais, Brazil
Green Tourmaline in Muscovite, Maine
Tourmaline crystal
Tourmaline gem, 365 carat
Blue tourmaline crystals
Quartz and green tourmaline crystals
Pink tourmaline crystals growing on mica
Tourmaline mineral, light micrograph
Schorl, the black variety of Tourmaline
Blue opal gemstones
Dravite mineral
Schorl and quartz crystals in groundmass
Hawk's Eye quartz stone
Black tourmaline, SEM
Tourmaline crystal specimen
Tourmaline crystal specimens
Rubellite Tourmaline in Lepidolite Mica
Elbaite mineral
Crystals of green toumaline and pink lepidolite
Tourmaline crystal, thin section
Tourmaline crystals in quartzite
Tourmaline embedded in feldspar rock
Single piece of blue opal
Opal rock
Black opal gemstone
Rubellite tourmaline pendant
Yellow-green Tourmaline rough
Graphic tourmaline, light micrograph
Opal mineral stone
Moonstone gemstones
Amethyst gemstones
Granitic pegmatite
Elbaite on albite and quartz
Rubellite I
Rubellite II
Granite specimen
Mylonite, light micrograph
Trillion cut tourmaline gemstone
Cut green Paraiba Tourmaline gemstone
Opal gemstone
Topaz gemstones
Turquoise gemstones
Polarized light experiments, 1847
Cut Watermelon Tourmaline gemstone
Tourmaline schorl specimen
Emerald gemstones
Opal in its host rock
Opal gem and rock
Fire opal
Opal surface
Opal on bedrock
Ironstone matrix with potch opal
Potch opal with smooth and rough surface
Peridot gemstones
Opal gem necklace
電気石
紅電気石
Sapphire gemstones
Ruby gemstones
Opal specimen
Opal specimens
Opal
Diamond gemstones
Cut green Tourmaline gemstone
Tourmaline on quartz
オパール
Garnet gemstones
Opalised fossil
Fire Opal
Turquoise stones
Luxulyanite, thin section, LM
Fire opal birthstone
Mineral samples
Boulder opal formation
Opal specimen and cut stone
Round polished Common Opal
Assortment of Gemstones
Tourmaline unworked stones
Garnet.
Tarquoise.
Polished turquoise stone
Moonstone.
Uncut diamond from Africa
Aquamarine crystal
Asscher cut diamond gemstone
Pink diamonds
Aquamarine gems
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
Jade gemstones
Schorl (black Toutmaline)
Tourmaline in pegmatite host rock
Uncut diamonds
Tourmaline cross section
Precious gemstones
Five polished ruby gemstones
Diamond
Turquoise gemstone
Amethyst crystals
Citrine.
Orthoclase adenoma moonstone gemstone
Uncut emeralds
Rough emerald
Citrine crystals
Cut Fire Opal gemstone
'Black' opal cabochon specimen
Semi precious gemstones
Sapphire gemstone
Yellow diamond
Diamonds
Rough pinkish-red Rubellite