- ArchiefMG 146 - W.O. Kupsch fonds
- ReeksJ. Audio-Visual Materials
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- StukWOK 19-1 - Smoky quartz, St. Gothard, Switzerland. A group of smoky crystals
- StukWOK 19-2 - Quartz twin, Japan. Typical "Japanese" twin.
- StukWOK 19-3 - Fluorite, Cave-in-Rock, Illinois. A group of large purple cubic crystals
- StukWOK 19-4 - Fluorite, Westmoreland, New Hampshire. An excellent example of the octahedral cleavage fluorite
- StukWOK 19-5 - Halite (cubo-octahedron)
- StukWOK 19-6 - Basic unit of silicate structure
- StukWOK 19-7 - Chain structures for amphiboles and pyroxenes
- StukWOK 19-8 - Muscovite.
- StukWOK 19-9 - Paleogeography of early Ordivician of North America
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