 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 |