Tourmaline crystals in quartz
Quartz crystals
Smoky quartz crystals
Schorl tourmaline crystal stone
Hawk's Eye quartz stone
Schorl and quartz crystals in groundmass
Rutilated quartz
Tourmaline crystals in quartzite
Elbaite on albite and quartz
Tourmaline
Tourmaline quartz
Watermelon tourmaline
Tourmaline in quartz
Indicolite tourmaline faceted stone
Watermelon tourmaline crystalline stone
Rubellite tourmaline pendant
Tourmaline crystal specimen
Tourmaline crystal specimens
Elbaite mineral (tourmaline)
Black tourmaline in mica schist
Tourmaline embedded in feldspar rock
Quartz and green tourmaline crystals
Graphic tourmaline, light micrograph
Tourmaline gemstone
Elbaite mineral
Dravite mineral
Tourmaline gemstones in quartz
Tourmaline schorl specimen
Tourmaline on quartz
Granite specimen
Tourmaline crystal
Tourmaline Pegmatite
Raw tourmaline crystal
Tourmaline gemstones and crystal
Tourmaline crystal, thin section
Tourmaline in gneiss rock
Calcite crystals
Tourmaline unworked stones
Bi-coloured tourmaline crystals
Tourmaline cross section
Verdite green tourmaline gemstone
Rhodochrosite mineral
Opal gem necklace
Amethyst crystals
Tourmaline in pegmatite host rock
Tourmaline specimen
Rhombohedral siderite crystals
Red calcite crystals
Quartz types
Chalcopyrite and quartz crystals
Galenite and quartz crystals
Chabazite crystals in quartz
Quartz encrusted calcite crystals
Orthoclase and quartz crystals
Crystals of haematite in quartz
Rough pinkish-red Rubellite
Amethyst
Amethyst geode
Amethyst geodes
Garnet gemstone
Amethyst filled geode
Amethyst geode interior
Amethyst and chalcedony
Quartz
Fire opal
'Black' opal cabochon specimen
Opalised fossil
Ironstone matrix with potch opal
Mineral samples
Opal
Tourmaline crystals
Citrine
Tourmaline crystals in matrix
Tourmaline crystals on Albite
Blue tourmaline crystals
Feldspar and quartz
Rose quartz mineral, artwork
Hyacinth quartz
Tourmaline Crystals, Minas Gerais, Brazil
Cut Watermelon Tourmaline gemstone
Yellow-green Tourmaline rough
Trillion cut tourmaline gemstone
Mylonite, light micrograph
Aragonite crystals
Magnetite in quartz
Quartz in sphalerite
Molybdenite in quartz monzonite
Zeolite in quartz
Pyrolusite in quartz
Quartz polished stone
Tiger Eye quartz gemstone
Quartz filled concretion
Tellurium in quartz
Hessite in quartz
Emerald crystal in quartz
Quartz vein in granite
Native gold on quartz
Emerald in quartz
Cut green Paraiba Tourmaline gemstone
Pink tourmaline crystals growing on mica
Labradorite rock crystals
Mica in quartz, light micrograph
Cuprocassiterite in quartz mica schist
Deformed quartz veins in slate
Colourful crystals
Quartz vein
Quartz and cassiterite crystals
Tourmaline gem
Tourmaline gemstones
Tourmaline pegmatite
Almandine
Quartz crystal from Sentis, Switzerland.
Herkimer diamonds of quartz mineral
Microdiamond crystal
Black tourmaline, SEM
Tourmaline gem, 365 carat
Elbaite crystal, variety Tourmaline
Albite with Tourmaline
Tourmaline mineral, light micrograph
Tourmaline mica in slate
Citrine crystals
Citrine gemstones and crystal
Schorl variety of Tourmaline, Namibia
Rubellite Tourmaline in Lepidolite Mica
Green Tourmaline in Muscovite, Maine
Amethyst crystals, light micrograph
Sylvanite crystals
Quartz mineral stone, light micrograph
Schorl, the black variety of Tourmaline
Iron oxide precipitation in agate
Agate mineral rock cross section
Jasp agate stone
Jasp agate polished surface
Cabuchon gemstones of jasper
Egyptian jasper stone
Botswana agate stones