File:Quartz-46809.jpg · Wikimedia Commons · See Wikimedia Commons
Chalcedony is a type of mineral made from extremely fine mixtures of quartz and moganite, both forms of silicon dioxide, that are so tiny they can't be seen individually with the naked eye. It's composed of the same basic material as regular quartz, but has a different internal structure due to the way these two mineral components are interwoven together.
AI-generated from the Wikipedia summary — may contain errors.
Key facts
- Mineral.name
- Chalcedony
- Mineral.category
- Tectosilicate minerals
- Mineral.group
- Quartz group
- Mineral.IMAstatus
- Variety of quartz
- Mineral.image
- Quartz-46809.jpg
- Mineral.imagesize
- 260px
- Mineral.caption
- A botryoidal geode specimen from Mexico
- Mineral.formula
- (silica)
- Mineral.molweight
- 60 g/mol
- Mineral.color
- Various
- Mineral.habit
- Various
- Mineral.system
- Trigonal (quartz) or monoclinic (moganite)
- Mineral.cleavage
- Absent
- Mineral.fracture
- Uneven, splintery, conchoidal
- Mineral.mohs
- 6–7
- Mineral.luster
- Waxy, vitreous, dull, greasy, silky
- Mineral.streak
- White
- Mineral.gravity
- 2.59–2.61
via Wikipedia infobox
Wikidata facts
- Instance of
- mineral variety
- Subclass of
- quartz
- Image
- Mineraly.sk - chalcedon.jpg
Show 7 more facts
- streak color
- white
- Commons category
- Chalcedony
- Commons gallery
- Chalcedony
- topic's main category
- Category:Chalcedony
- crystal system
- trigonal crystal system
- Mohs' hardness
- 7.0
- different from
- Chalcedon
Sources (7)
via Wikidata · CC0
Article · Italiano
II calcedonio è il nome generico che viene dato al quarzo quando si presenta in masse compatte di silice microcristallina con tessitura fibroso-orientata. Il nome deriva dal greco Χαλκηδών (Chalkedón), riferito a Calcedonia, antica città mineraria della Bitinia (oggi Kadiköy, in Turchia) con porto sul Mar di Marmara, nei cui dintorni si estraeva il materiale usato per creare ornamenti. Tutte le varietà sono considerate pietre dure e utilizzate a scopo ornamentale, fin dall'antichità, soprattutto per la creazione di cammei e intagli.
Abstract from DBpedia / Wikipedia · CC BY-SA
Gallery (38)
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