Tourmaline pegmatite
Tourmaline Pegmatite
Rubellite I
Rubellite II
Pink tourmaline crystals growing on mica
Green Tourmaline in Muscovite, Maine
Verdite green tourmaline gemstone
Crystals of green toumaline and pink lepidolite
Bi-coloured tourmaline crystals
Tourmaline gemstone
Rubellite Tourmaline in Lepidolite Mica
Tourmaline gem
Tourmaline gem, 365 carat
Tourmaline
Tourmaline in pegmatite host rock
Tourmaline crystals
Tourmaline specimen
Watermelon tourmaline
Tourmaline mica in slate
Black tourmaline in mica schist
Raw tourmaline crystal
Tourmaline gemstones and crystal
Tourmaline crystals in matrix
Elbaite crystal, variety Tourmaline
Albite with Tourmaline
Tourmaline crystals on Albite
Tourmaline gemstones in quartz
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Schorl tourmaline crystal stone
Tourmaline crystals in quartz
Blue tourmaline crystals
Elbaite mineral (tourmaline)
Schorl variety of Tourmaline, Namibia
Granitic pegmatite
Tourmaline crystal
Tourmaline gemstones
Tourmaline quartz
Schorl and quartz crystals in groundmass
Emeralds
Tourmaline mineral, light micrograph
Tourmaline in quartz
Tourmaline in gneiss rock
Quartz and green tourmaline crystals
Tourmaline Crystals, Minas Gerais, Brazil
Hawk's Eye quartz stone
Elbaite mineral
Dravite mineral
Granite specimen
Graphic tourmaline, light micrograph
Schorl, the black variety of Tourmaline
Pegmatite specimen
Tourmaline crystals in quartzite
Rubellite tourmaline pendant
Tourmaline crystal specimen
Tourmaline crystal specimens
Tourmaline embedded in feldspar rock
Opal gemstones
Single piece of blue opal
Opal mineral stone
Opal rock
Black opal gemstone
Elbaite on albite and quartz
Tourmaline crystal, thin section
Black tourmaline, SEM
Blue opal gemstones
Zoisite in pegmatite groundmass
Obsidian mineral stone
Yellow-green Tourmaline rough
Aquamarine crystals
Opal gemstone
Pegmatite, New Hampshire, USA
Aquamarine in muscovite matrix
Aquamarine in muscovite matrix, close
Luxulyanite, thin section, LM
Cut Watermelon Tourmaline gemstone
Trillion cut tourmaline gemstone
Mylonite, light micrograph
Polarized light experiments, 1847
Cut green Paraiba Tourmaline gemstone
Opal
Opal gem necklace
Opal in its host rock
Opal gem and rock
Ironstone matrix with potch opal
Potch opal with smooth and rough surface
Brazilianite crystals
Brazilianite crystals in calcite
Tourmaline schorl specimen
Obsidian, a glassy igneous rock
Obsidian
Mahogany obsidian
Quartz-feldspar porphyry
Snowflake Obisidian
Opal specimen
Opalised fossil
Fire opal
Opal surface
Opal on bedrock
Snowflake obsidian
Boulder opal formation
Opal specimen and cut stone
Obsidian-rich lava flow, Tenerife
Garnet
Obsidian bubbles
Obsidian flow
Two-mica granite
Pebbles of snowflake obsidian rock lying on sand
Obsidian lava
Obsidian rock
Obsidian dome
電気石
紅電気石
オパール
Opal specimens
Turquoise stones
Round polished Common Opal
Fire Opal
Peridotite
Garnet in peridotite
Cut green Tourmaline gemstone
Uncut diamond from Africa
Pegmatite dike in granite
Mineral samples
Niobite in host rock
Niobite crystal
Variety of Igneous Rocks
Fuchsite mineral stone
Amethyst crystals
Citrine crystals
Slice through fossilised wood revealing opal
Tourmaline on quartz
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
Schorl (black Toutmaline)
Aquamarine crystal
Topaz gemstones
Asscher cut diamond gemstone
Pink diamonds
Moonstone gemstones
Aquamarine gems
Garnet.
Citrine.
Tarquoise.
Moonstone.
Orthoclase adenoma moonstone gemstone
Topaz gemstone