Mines Repository (Colorado School of Mines)
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    21416 research outputs found

    Franklinite on willemite

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    Photographed by Ron Wolf.Resinous black franklinite on white and pale pink willemite

    Hemimorphite

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    Photographed by Ron Wolf.Small crystals of yellow hemimorphite formed into rounded clusters

    Finance, Administration, and Operations newsletter June 2025

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    Dragonfly – Aeschnogomphus intermedius

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    Photographed by Ron Wolf.Imprint of a fossil dragonfly in tan fine-grained sedimentary rock

    Trilobite – Gravicalymene meeki

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    Photographed by Ron Wolf.Freestanding fossil trilobite, curled on its back

    Gold

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    Photographed by Ron Wolf.Gold flake on green and black matrix

    Leaf – Macginitiea wyomingensis

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    Photographed by Ron Wolf.Macginitiea wyomingensis: shows a dark brown fossil leaf from an Eocene sycamore tree

    Trilobite – Elrathia kingii

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    Photographed by Ron Wolf.Black fossil trilobite

    Galena with sphalerite

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    Photographed by Ron Wolf.Dull grey galena crystals with brown sphalerite, Argentine shaft, Rico district, Delores County, Colorado

    Chalcopyrite with galena

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    Photographed by Ron Wolf.Flecks of brassy chalcopyrite with grey galena

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