The second most abundant mineral in the Earth's continental crust, built from a continuous framework of silicon and oxygen. It defines hardness 7 on the Mohs scale and is the main constituent of most beach sand. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/
Facts
Classification
Crystal SystemTrigonal (Rhombohedral) 1 Classification UseWikipedia 'Quartz' states this use (or use-bearing statement); earth5 pass. UseIndustrial and Abrasive 2 Wikipedia 'Quartz' states this use (or use-bearing statement); earth5 pass. Formation ClassFramework silicate, classified compositionally as an oxide mineral 1 Chemical FormulaSiO2, a continuous framework of silicon-oxygen tetrahedra 1 Hardness (Mohs)Quartz is the reference mineral that defines the value of 7 on the Mohs scale itself. Connections
Associated With
Granite's own lead description names quartz as one of its main constituent minerals.
Source Granite (Wikipedia)
Quartz named as one of the three dominant minerals of most pegmatites.
Source Pegmatite (Wikipedia)
Quartz is the dominant, near-exclusive mineral of quartzite.
Source Quartzite (Wikipedia)
Quartz named directly as a predominant mineral of rhyolite.
Source Rhyolite (Wikipedia)
Quartz is the dominant framework mineral of sandstone.
Source Sandstone (Wikipedia)
Classified As
Crystallizes In System
In Discipline
Source Mineral (Wikipedia)
In the Other Atlases
Mineral Species Of
Also in Divinity Atlas: of this mineral species.
Also in Divinity Atlas: of this mineral species.
Also in Divinity Atlas: of this mineral species.
Also in Divinity Atlas: of this mineral species.
Also in Divinity Atlas: of this mineral species.
Also in Divinity Atlas: of this mineral species.
Also in Divinity Atlas: of this mineral species.
Also in Divinity Atlas: of this mineral species.
Also in Divinity Atlas: of this mineral species.
Sources
1. Quartz (Wikipedia)
Wikimedia FoundationLead section
Quartz is a hard mineral composed of silica (silicon dioxide).
Article text
Quartz can form as two distinct polymorphs depending on the temperature and pressure: α-quartz (also called low quartz or normal quartz) and β-quartz (also called quartz-beta or high quartz). α-quartz crystallizes in the trigonal crystal system, while β-quartz has greater symmetry and crystallizes in the hexagonal crystal system.
View the Source 2. Wikidata: Quartz
Wikidata Q43010
Granite (Wikipedia)
Wikimedia FoundationAssociated With: Granite, Lead sectionQuote, Associated With: Granite, Lead section
is a coarse-grained (phaneritic) intrusive igneous rock composed mostly of quartz, alkali feldspar, mica and plagioclase.
Rhyolite (Wikipedia)
Wikimedia FoundationAssociated With: Rhyolite, Mineralogy sectionQuote, Associated With: Rhyolite, Mineralogy section
The mineral assemblage is predominantly quartz, sanidine, and plagioclase.
Pegmatite (Wikipedia)
Wikimedia FoundationAssociated With: Pegmatite, Lead sectionQuote, Associated With: Pegmatite, Lead section
Most pegmatites are composed of quartz, feldspar, and mica, having a similar silicic composition to granite.
Sandstone (Wikipedia)
Wikimedia FoundationAssociated With: Sandstone, Composition sectionQuote, Associated With: Sandstone, Composition section
Quartz framework grains are the dominant minerals in most clastic sedimentary rocks; this is because they have exceptional physical properties, such as hardness and chemical stability.
Quartzite (Wikipedia)
Wikimedia FoundationAssociated With: Quartzite, Lead sectionQuote, Associated With: Quartzite, Lead section
Quartzite is a very hard rock composed predominantly of an interlocking mosaic of quartz crystals.
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