Fluorite on Galena, Minerva #1 Mine, Cave-In-Rock, IL |
Beach pebbles, Lake McDonald Glacier National Park, MT |
Photomicrograph of peridotite in thin section X10 |
Iron oxide stain in Navajo Sandstone, Coyote Buttes, AZ |
Photomicrograph of biotite schist in thin section X10 |
Iron stained Navajo Sandstone near Kanab, UT |
Banded iron formation with tiger-eye, Mount Brockman, Australia |
Banded iron formation, Ispheming MI |
Blue quartz rhyolite porphyry, Llano TX |
Agate, Brazil |
Iron stained Navajo Sandstone near Kanab UT |
Rhodochrosite stalactites cross-section, Catamarca, Argentina |
Polished slab of petrified wood, Holbrook, AZ |
Agate, Brazil |
Amethyst-agate geode, Brazil |
Pyrite suns, Sparta, IL |
Irridescent specular hematite, Minas Gerais, Brazil |
Bornite (peacock ore), Butte MT |
Thunderegg from the Priday layer, Richardson Ranch, OR |
Petrified wood, Petrified Forest National Park, AZ |
Chrysocolla and Limonite (iron oxide), AZ |
Petrified Wood, Petrified Forest National Park, AZ |
Garnet and Smokey Quartz, on Potassium Feldspar matrix |
Smokey Quartz and Amazonite, CO |
Galena and chalcopyrite on Dolomite, Tri-state District, Joplin, MO |
Amethyst Crystals, Brazil |
Quartz and Pyrite Crystals, CO |
Wulfenite, Red Cloud Mine, AZ |
Gray, red, white, and blue Agate |
Selenite Crystals |
Amazonite, Pikes Peak, CO |
Large yellow calcite crystal on matrix of smaller clear calcite crystals, Denton Mine, Cave-In-Rock, IL |
Banded Iron Formation containing Hematite, Tiger-eye, and Jasper from Mt. Brockman, Australia |
Calcite, Dogtooth Spar Crystals, MO |
Scalenohedral Calcite Crystal on Pink Dolomite Crystals in a Vug within Dolostone, Tri-state District, Joplin, MO |
Agate |
Iridescense due to twinning in Labradorite, Madagascar |
Petrified Wood, Petrified Forest National Park, AZ |
Tourmaline and Lepidolite, Pala, CA |
Petrified wood, Chinle Wash, AZ |
Cubic Galena crystals coated with tiny pyrite crystals from Lead and Zinc Mines, Galena, IL |
Pyrite, Sphalerite, and Quartz, Huanzala Mine, Huallanca Disrict, Peru |
Amethyst Crystals, Minas Gerais, Brazil |
Septarian Concreation, UT |
Thundereggs from Richardson Ranch near Madras, OR |
Copper Ore: Azurite (blue), Malachite (green), and Limonite (brown), Morenci Mine, AZ. |
Fluorite, Drusy Quartz, and Calcite, Cave-in-Rock, IL |
Quartz with pink tourmaline (Rubellite) from the Stewart Mine, Pala, CA |
Vanadinite from the Mibladen District, Morocco |
Black petrified wood, Petrified Forest National Park, AZ |
Brazilian Agte |
Fluorite Bear |
Quartz Crystal's on Sphalerite, Peru |
Muscovite Crystals |
Spessartite garnets |
Peridot Rich Beach Sand, Hawaii |
Beryl Var. (Aquamarine) and Muscovite, University of Utah Collection. |
Tourmaline var.(Elbaite), University of Utah Collection. |
Spodumene Var. (Morganite), University of Utah Collection |
Chalcopyrite on Dolomite, Tri-state District, MO |
Auricalcite and Limonite, Mexico |
Apatite and Calcite, Durango, Mexico |
Celestite Geode, Findlay, Ohio |
Malachite, Arizona |
Dogtooth Spar Calcite and Fluorite, Cave-in-Rock, Illinois |
Amethyst Geode, Minas Gerais, Brazil |
Epidote Crystal, Green Monster Mountain, Prince of Wales Island, Alaska |
Kyanite, Madagascar |
Citrine |
Witherite on Fluorite, Cave-in-Rock, IL |
Native Copper, Keweenaw Peninsula, MI |
Ram's Horn Gypsum (Selenite) Crystal on Aragonite, Chihuahua, Mexico. |
Adamite, calcite, and limonite, Durango, Mexico |
Rose Quartz, Black Hills, South Dakota |
Pyrite |
Stilbite on Apophyllite Crystals, Poonah, India |
Large Garnet (2") in Mafic Metamophic rock (amphibolite) from Gore Mountain, NY. |
Botryoidal Hematite, Keweenaw Peninsula, MI |
Rose Quartz from a pegmatite, Black Hills, South Dakota |
Yellow Fluorite and Sphalerite (zinc ore), Denton Mine, Cave-in-Rock, IL |
Marcasite and Calcite, Galena, IL |
Sphalerite on Blue Fluorite, and Yellow Fluorite, Cave-in-Rock, IL |
Ruby Sphalerite on Drusy Quartz and Chert, Rosiclare, IL |
Smithsonite, Kelly Mine, Magdalena District, Socorro County, NM |
Amazonite and Smokey Quartz, Teller County, CO |
Jasper |
Zoning in Fluorite Crystals, Cave-in-Rock, IL |
Goethite |
Cluster of Quartz Crystals, Hot Springs, AR |
Calcite crystals on Fluorite, Cave-in-Rock, IL |
Octahedral Crystals of Pyrite with small crystals of Chalcopyrite |
Blue Fluorite on Sphalerite, Cave-in-Rock, Illinois |
Blue Fluorite, Cave-in-Rock, Illinois |
Limonite, Calcite, and Rosasite, Durango, Mexico |
Zoned Fluorite (Yellow to Purple) with specks of Chalcopyrite, Cave-In-Rock, IL |
Polished Malachite, AZ |
Blue Calcite with Iron Oxide, Chihuahua, Mexico |
Fluorite covered with Calcite Crystals, Minerva #1 Mine, Cave-in-Rock, IL |