Actinolite
Actinolite, Chester, Vermont, USA
Actinolite, Tyringham, Massachusetts, USA
Actinolite crystals
Titanite crystals in actinolite
Actinolite mineral, light micrograph
Ilmenite crystal with actinolite and quartz
Nephrite crystals
Jade sword handle
Actinolite crystals with talc
Jadeite carved dish from China
Nephrite jade specimen
Tremolite, Tyringham, Massachusetts, USA
緑閃石
Tremolite, Canaan, Connecticut, USA
Tremolite variety Hexagonite
actinolite
Amphibole Asbestos, Maryland, USA
Azurite.
Anthophyllite asbestos
Asbestos sample
Azurite crystals
Azurite in Limonite Groundmass
Azurite, an ore of Copper
Azurite, New Mexico, USA
Azurite
Realgar
Tremolite crystals
Stilbite, Tyringham, Massachusetts, USA
Realgar (Arsenic Sulfide)
Realgar, Nevada, USA
Brochantite and azurite crystals
Granodiorite rock, light micrograph
Metamorphic rock
Malachite and Azurite
A specimen of the mineral azurite found in Eire
Lee Quartz Diorite, Massachusetts, USA
Petrified Wood, New Mexico
Hyalite Opal
Realgar with grey quartz
Orpiment (Yellow) and Realgar (Red)
Garnet
Canari asbestos plant, Corsica
Barite
Mineral deposition
Orpiment on pyrite
Spherical concretions of radiating azurite crystals
Tremolite, New Jersey, USA.
Amphibole mineral, light micrograph
Plutonic rock, light micrograph
Tourmaline crystals in matrix
Chalcedony open geode, Hamilton, Illinois
Thunderegg Geode with Quartz and Agate
Molybdenite, New York
Malachite
Beryl, Massachusetts
Close-up of Chrysoprase, Newfane, Vermont
Amphibolite, light micrograph
Hematite, an ore of Iron, Massachusetts
Azurite copper ore stone
Chrysocolla with azurite
Muscovite Mica, Ontario, Canada
Sodalite, Bancroft, Ontario, Canada
Gypsum variety Sand Selenite
Variscite, an aluminium phosphate
Prehnite, Patterson, New Jersey, USA
Malachite, Arizona, USA
Unakite, Virginia, USA
Celestite crystals
Calcite crystals
Fluorite
Smoky Quartz crystal
Aragonite crystals
Beryl, Barton, Vermont, USA
Fluorapatite crystals
Cyanite
Marble close-up, Massachusetts, USA
Beryl crystal
Citrine
Andalusite, Lancaster, Massachusetts, USA
Rutile crystals, Brazil
Staurolite, Patrick County, Virginia, USA
Muscovite Mica
Citrine crystals, Rio Grande, Brazil
Smoky Quartz specimen
Vanadinite specimen
Apatite crystals
Thunderegg or Agate Geode
Pyrite Sun
Septarian Geode
Stilbite, Tenino, Washington, USA
Fluorite crystals, New Mexico
Fluorite crystals, New Mexico, USA
Chalcedony, New Mexico, USA
Realgar and Orpiment
Spessartite crystals, Monroe, Connecticut
Stamford Granite Gneiss
Quartzite, Massachusetts, USA
Arsenopyrite, Massachusetts
Nagyagite
Forms of copper ore
Azurite in host rock
Azurite and malachite deposits
Azurite and malachite
Chrysocolla, Arizona, USA
Axinite crystals
Tiger's-eye variety of Chalcedony, Africa
Fluorite specimen
Kyanite
Cinnabar, Nevada, USA
Spinel, Bridgewater, Vermont
Golden Beryl, Nottingham, New Hampshire
Schorl, the black variety of Tourmaline
Tourmaline
Variscite
Amazon Stone or Amazonite
Green Tourmaline in Muscovite, Maine
Chrysoberyl, Brazil
Vanadinite, an ore of Vanadium
Hematite, an iron ore, Minnesota, USA
Zincite on Franklinite
Fluorite or Fluorspar (95% pure)
Botryoidal Malachite
Diorite-Aplite, Massachusetts, USA
Apophyllite crystals
Augite, Tyringham, Massachusetts, USA
Natrolite, Tyringham, Massachusetts, USA
Arkose, a sedimentary rock, Massachusetts
Becket Granite Gneiss, Massachusetts, USA
Fuchsite, A Chromium Mica
Beryl, New Hampshire
Talc, Holly Springs, Georgia, USA
Jasper.
Pyrite
Apophyllite and Prehnite
Apophyllite crystals, Poonah, India
Apophyllite crystals, Guanajuato, Mexico
Opened Smoky Quartz Geode
Carnelian, Hambach, Germany
Close-up of Celestite crystals
Agate geode sliced, Brazil
Rhodochrosite close-up, Argentina
Rhodochrosite
Sodalite, Norway
Rose Quartz close-up
Lazurite
Aragonite crystals, Morocco
Barite crystals, Spain
Grossularite Garnet crystals, Hessonite
Vanadinite crystals, an ore of Vanadium
Sulfur, a native element
Sulfur, Italy
Selenite crystals, Winnipeg, Canada
Pyrite crystals
Mica in Beryl
Andradite, New Jersey
Fossil raindrops on a sandstone rock
Fossil fish (Semionotus)
Crab, Oligocene
Goethite, Rhode Island
Scolecite
Sodalite.
Mica Schist, Massachusetts, USA
Hinsdale Gneiss, Massachusetts, USA