Banded iron specimen
Haematite specimen
Banded iron formation
Sample of haematite
Haematite mineral specimen
Hematite, an iron ore
Hematite ore of Iron, Brazil
Hematite, an ore of iron
Hematite, an ore of Iron, Massachusetts
Hematite, an iron ore, Minnesota, USA
Hematite, England
Hematite, Pencil Ore variety, England
Haematite crystal
Haematite mineral rock
Hematite crystals
Haematite (kidney ore)
Lumps of hematite iron ore
Haematite
Banded iron formation (BIF)
Brecciated Agate stone
Haematite group of stones
Haematite tumblestone polished stone
Ruby
Hematite, close-up
Hematite rock
Haematite ore
Haematite, SEM
Dendritic copper specimen
Mineral precipitation in agate
Crystals of haematite in quartz
Banded Ironstone Formation (BIF)
Haematite on Mars, satellite image
Pyrite with Hematite, Italy
Reniform Hematite
Foliar Hematite
Hematite, Minasgerais, Brazil
Barite crystals with Hematite
Specularite and Quartz with overgrowing hematite
Botryoidal hematite
Hyacinth quartz
Hematite kidney ore
Molybdenite specimen
Obsidian specimen
Iron ore
Allende meteorite specimen
Nephrite jade specimen
'Black' opal cabochon specimen
Banded iron ore
赤鉄鉱
Opal specimen and cut stone
Limonite specimen
Pseudomorphic crystal growth
Sulphur crystals
Belt-hook carved in lapis lazuli
Martian rock research
Granite specimen
Quartzite specimen
Agate lava geode
Boulder opal formation
Amethyst
Polished and cut turquoise
Hemimorphite crystals
Strontianite crystals
Gypsum crystals
Amethyst crystals
Uvarovite garnet crystals
Carved malachite column
Orange sapphire gemstone
Fluorite crystals
Topaz gemstone
Muscovite
Rhodonite specimen
Black and red banded Ironstone
Rubellite tourmaline pendant
Jadeite carved dish from China
Silver wire, mine specimen
Lapis lazuli specimen
Petrified wood, fossil specimen
Hematite, bead, oval cabochon, marquise cabochon
Pyrite crystals
Bournonite
Stibnite
Chromite
Uraninite in calcite
Malachite-based mineral deposit
Fluorspar crystals
Actinolite crystals
Silver deposits in quartzite
Banded flint
Quartz types
Calcite crystal specimen
Axinite mineral specimen
Baryte mineral specimen
Galena (Lead) Crystal Gemstone
Goethite, Rhode Island
Pyrite crystals in their host rock
Cobaltine mineral, cobalt ore
Chalcosite
Tourmaline crystal specimen
Chrysocolla, macrophotograph
Chrysocolla mineral
Araucarioxylon sp., fossil conifer
Neolithic axe
Tremolite crystals
Zinc ore under ultraviolet light
Zinc ore
Native copper
Taconite processing plant, USA
ruddle
Kunzite crystal and cut stone
Iron pyrite
Actinolite crystals with talc
Tourmaline schorl specimen
Amethyst geode interior
Tiger's eye and Hawk's eye gemstones
Large citrine gemstone
Tourmaline crystal specimens
Iron pyrite crystals
Hematite gemstone on white background
Vanadinite specimen
Magnetite and calcite
Magnetite in quartz
Cuprocassiterite in quartz mica schist
Galenite and quartz crystals
Pyrolusite in quartz
Diamond processing, Siberia, Russia
Opal on bedrock
Molybdenite mineral, molybdenum ore
Chromite and serpentine
Cerussite
Orange crystal
Banded malachite
Banded Malachite
Diamond with garnet inclusion
Marble mineral specimen
Chrysocolla
Pyrite, Colorado
Tourmaline specimen
Agate specimen
Azurite crystals
Dioptase crystals
Sample of rose quartz
Labradorite
Malachite
Twinned staurolite crystals
Sodalite
Tiger eye
Campo del Cielo meteorite fragment
Quartz monzonite
Fairburn agate
Union road agate
Lysite agate
Lake Superior agate
Paint rock agate
Paul Bunyon plume agate
Siam Siding agate
Plume agate
Fourth of July Butte agate