Chalcedony
Query URLs
https://term.museum-digital.de/md-de/tag/9671
- Note
- "Chalcedony ( /kælˈsɛdəni/) is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite. These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monoclinic. Chalcedony´s standard chemical structure (based on the chemical structure of quartz) is SiO2 (silicon dioxide).
Chalcedony has a waxy luster, and may be semitransparent or translucent. It can assume a wide range of colors, but those most commonly seen are white to gray, grayish-blue or a shade of brown ranging from pale to nearly black. The color of chalcedony sold commercially is often enhanced by dyeing or heating." - (en.wikipedia.org 09.10.2019)
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Pseudomalachit (Ehlit) auf Chalcedon
Auf der rechten Rheinseite...
Object information
Image: Naturhistorisches Museum Mainz / Landessammlung für Naturkunde Rheinland-Pfalz - CC BY-NC-SA -
Chalcedon auf Amethyst
Chalcedon auf Amethyst
Object information
Image: Naturhistorisches Museum Mainz / Landessammlung für Naturkunde Rheinland-Pfalz - CC BY-NC-SA -
Chalcedon mit Porzellan-Jaspis
Der faserig aufgebaute...
Object information
Image: Geomuseum der WWU Münster - CC BY-NC-SA -
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Deckelbecher aus Chalzedonglas
Becher mit zugehörigem Deckel...
Object information
Image: Museum Kunstpalast, Düsseldorf, Glasmuseum Hentrich - CC BY-NC-SA
References
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