- ArchiefMG 146 - W.O. Kupsch fonds
- ReeksJ. Audio-Visual Materials
- 2090 more...
- StukWOK 18-147 - Agate, Brazil. Banded grey agate, crystalline quartz and amethyst
- StukWOK 18-148 - Quartz, var. Milky quartz, Curay, Colorado. A choice group of large milky white crystals
- StukWOK 18-149 - Quartz, var. Rock crystal, Little Falls, New York.
- StukWOK 18-150 - Quartz, var. Petrified wood, near Holbrook, Arizona
- 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)
- 206 more...