Snowflake Obisidian
Snowflake obsidian
Pebbles of snowflake obsidian rock lying on sand
Obsidian rock
Obsidian mineral stone
Obsidian, a glassy igneous rock
Obsidian
Mahogany obsidian
Obsidian-rich lava flow, Tenerife
Obsidian bubbles
Obsidian flow
Obsidian lava
Obsidian dome
Mahogany Obsidian, Oregon, USA
Variety of Igneous Rocks
Density of pumice and obsidian
Lava landscape
Neolithic stone tool
Obsidian specimen
Snowflake obsidian gemstone on white background
Neolithic stone tools
黒曜石
Green Tourmaline in Muscovite, Maine
Tourmaline Pegmatite
Tourmaline pegmatite
Quartz-feldspar porphyry
Two-mica granite
Pink tourmaline crystals growing on mica
Crystals of green toumaline and pink lepidolite
Aquamarine crystals
TOLOWA dancing head-dress 1923
Emeralds
Fuchsite mineral stone
Rubellite Tourmaline in Lepidolite Mica
Flint knappings from making of tools.
Flints knapped for use as knives
新緑の大瀧神社の御神体
Rhyolite mountain, Iceland
Titanite bearing granite
Garnet
Polished sphere of ocean jasper
Healing gemstones
Rhyolitic geode
Muscovite crystals in rock groundmass
Muscovite Mica, Ontario, Canada
Muscovite Mica
Granite
Coastal rocks and pebbles
Graphic granite rock
Peridotite
Garnet in peridotite
Ancient Roman columns
Aggregate of muscovite crystals
Hawk's Eye
Tiger's Eye
Amethyst crystals
Polished Esterel rhyolite agate
Turquoise stones
Quartzite rocks
Quartzite rocks covered in lichens
Lepidolite Crystal Gemstone
Emerald crystal, close up
Olivine peridot crystal, close up
Sphene crystals in groundmass, close-up
Topaz
Aquamarine crystal, variety Beryl
Peridot gemstones
Aquamarine gems
Garnet.
Tarquoise.
Moonstone.
Tiger Eye.
Pink-white chabazite in basalt groundmass
Crackle quartz
Quartz mineral stone
Quartz polished stone
Star sapphire stone
Green Avanturine Quartz gemstone
Smokey Quartz gemstone
Milky Quartz gemstone
Tiger eye
Quartz monzonite
Herkimer diamonds
Sand
Quartz crystal mineral
A specimen of quartz
Uncut diamond from Africa
Rubellite I
Rubellite II
Polished variscite stone
Aventurine
Blue benitoite and white natrolite
Mica schist folds, light micrograph
Melaphyr rock, light micrograph
Banded rhyolite
Pegmatite specimen
Tuff specimen
Biotite
Biotite, Tyringham, Massachusetts, USA
Rhyolite, Mexico
Sample of biotite
Diamond in kimberlite
Yellow faceted prehnite
Quartzite metamorphic rock
Dendritic crystals in chalcedony
Opal gemstone
Jasper specimen
Opal
Quartz vein in granite
Graphic granite rock, light micrograph
Topaz gemstones
Emerald gemstones
Aquamarine gem, 3 carat
Zircon gem
Ruby
Polished Opal gemstone
Polished Opal
Muscovite Star Mica
Brazilianite crystals in calcite
Basaltic dyke rock
Cut and polished septarian nodule
Banded gneiss
Sample of muscovite
Mass of pyramid-shaped amethyst crystals
Single amethyst crystal, close up
Smoky quartz crystals
Tourmaline crystals in matrix
Aragonite crystals, Morocco
Quartz crystals
Raw amethyst crystal
Raw aquamarine crystal
Raw tourmaline crystal
Tourmaline gemstones and crystal
Imperial Jade streaked with green
Prismatic amethyst crystal
Grossular garnet crystals on rock surface
Elbaite mineral (tourmaline)
Five polished ruby gemstones
Topaz, Minas Gerais, Brazil
Grossular, Mexico
Beryl crystal
Bloodstone
Bloodstone specimen
Sodalite, Norway
Tourmaline
Lazurite
Fluorite
Elbaite crystal, variety Tourmaline
Schorl variety of Tourmaline, Namibia
Tourmaline crystals
Aquamarine crystal, a variety of Beryl
Grossularite Garnet crystals, Hessonite
Topaz or Beryl crystals
Garnet, Concord, Vermont, USA
Garnet, variety Uvarovite on diopside
Beryl in Quartz
Titanite, Sphene
Chrysoberyl, Brazil
Almandine