Rock and Mineral Exhibit, 2016-17

The University Libraries, in collaboration with Professor Mark Camp and the Department of Environmental Sciences, have created this exhibit showcasing a wide variety of rocks, minerals, and fossils from the University’s Museum of Mineralogy and Paleontology. The exhibit also contains samples from the personal collections of Mark Camp and Ruth Jacobs, along with Jeep artifacts loaned by Darryl Bauman.

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Amethyst
Amethyst
SiO2 - Mohs Hardness: 7. Fine amethysts are featured in the British Crown Jewels and they were also a favorite of Catherine the Great and Egyptian royalty. Amethyst also holds a high place in the ranks of the Christian church and was referred to as "the stone of bishops".
Amethyst
Amethyst
SiO2 - Mohs Hardness: 7. Amethyst name derives from the Greek "amethystos", which means "not drunken", as Amethyst in antiquity was thought to ward off drunkenness. The color of some Amethyst specimens from certain localities slowly fade upon prolonged exposure to light. When used as a gemstone, Amethyst is often heat treated to deepen the color, or to transform it into Citrine.
Amethyst
Amethyst
SiO2 - Mohs Hardness: 7. In antiquity, as well as in the Middle Ages, people believed that the cosmos was reflected in gemstones. The amethyst is assigned to the planet Neptune. The esoteric movement revived the ancient belief and the gem industry made it another marketing tool to promote certain gems.
Banded Iron Formation
Banded Iron Formation
A sedimentary rock consisting of layers of iron oxides, either magnetite or hematite, with alternating bands of shales and cherts. Banded iron beds are an important commercial source or iron ore, the primary ingredient in the production of steel. Large deposits are located in Minnesota and Western Australia.
Banded Iron Formation
Banded Iron Formation
Banded iron formations have greater than 15% sedimentary iron content. They are of economic interest as they host the world's largest iron ore deposits and many gold deposits.
Blue Fluorite
Blue Fluorite
CaF2 - Mohs Hardness: 4. Fluorite is commonly found as cubic crystals, but blue crystals are unusual. The blue color can be caused by trace amounts of yttrium substituting for calcium in the fluorite crystal structure.
Cobaltoan Calcite
Cobaltoan Calcite
(Ca,Co)CO3 - Mohs Hardness: 3. Cobaltoan Calcite is calcite composed of a large amount of cobalt which gives it a pinkish rose color. This crystal is thought to be beneficial for friendships, psychic abilities, and communication with the spirit world.
Coprolite
Coprolite
Eocene. Dinosaur droppings were crucial for ancient plant life. Just as modern-day farmers scatter manure around their crops (which replenishes the nitrogen compounds that make soil fertile), the millions of tons of dinosaur dung produced every single day during the Triassic, Jurassic and Cretaceous periods helped keep the world's forests lush and green.
Dinosaur Rib Section
Dinosaur Rib Section
Jurassic. Morrison Formation. Morrison Formation is a series of sedimentary rocks deposited during the Jurassic Period in western North America, from Montana to New Mexico. The Morrison Formation is famous for its dinosaur fossils, which have been collected for more than a century, beginning with a find near the town of Morrison, Colorado, in 1877. Radiometric dating indicates that the Morrison Formation is between 148 million and 155 million years old.
Dioptase / Quartz
Dioptase / Quartz
CuSiO,2(OH)2 - Mohs Hardness: 5. Dioptase is a brightly colored mineral, highly desired for its intense green color. It can form in very distinctive, well-developed crystals, but only a handful of well-known deposits have produced large crystals. Most localities of this mineral, including those in Arizona, only produce microcrystals. Dioptase crystals are generally fragile and can easily break or crumble, and therefore care must be exercised when handling specimens.
Fern
Fern
Pennsylvanian. During the Pennsylvanian Period, widespread swamps laid down the thick beds of dead plant material that today constitute most of the world's coal. Lasting some 33 million or so years, the Late Carboniferous or Pennsylvanian age was the high point of stem tetrapod evolution, especially during the Bashkirian and Moscovian epochs. During this time the first reptiles and synapsids evolved and quickly diversified.
Fluorite - Calcite
Fluorite - Calcite
CaF2 and CaCO3 - Mohs Hardness: 4 and 3. Illinois, USA is perhaps best known for world-class fluorites from the Minerva Mine, Denton Mine, and others throughout Hardin County and beyond. Besides colorful fluorites, many other minerals like celestine, galena, sphalerite calcite, and witherite have also been discovered there.

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