File:Quartz-46809.jpg · Wikimedia Commons · See Wikimedia Commons
calcedonia
Sign in to saveChalcedony ( or ) 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 composition of quartz) is (silicon dioxide).
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 · Español
La calcedonia es un mineral de sílice (SiO2) de estructura microcristalina. Tradicionalmente considerada una variedad de cuarzo, más recientemente se ha visto que en realidad es una mezcla de cuarzo con moganita, mineral de igual fórmula química pero monoclínico, produciendo la mezcla los bandeados típicos de algunas de las variedades de calcedonia.
Abstract from DBpedia / Wikipedia · CC BY-SA
Gallery (38)
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