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
Entity-backed identity for the material classification this material already carries as an enum fact, pointing at the class subcategory of the same name. The enum fact itself stays on the entity unchanged.
Crystallizes In System
Entity-backed identity for the crystal-system enum value this material already carries, resolved to an earth concept by an explicit value-to-entity map (phase 3 bucket conversion, docs\design_entity_backed_browse_buckets_20260928.md). The crystal-system fact itself stays on the material unchanged.
In Discipline
Source Mineral (Wikipedia)
In the Other Atlases
- Also in Divinity Atlas: Amethyst, mineral species of there.
- Also in Divinity Atlas: Carnelian, mineral species of there.
- Also in Divinity Atlas: Citrine, mineral species of there.
- Also in Divinity Atlas: Clear Quartz, mineral species of there.
- Also in Divinity Atlas: Green Aventurine, mineral species of there.
- Also in Divinity Atlas: Rose Quartz, mineral species of there.
- Also in Divinity Atlas: Smoky Quartz, mineral species of there.
- Also in Divinity Atlas: Tiger’s Eye, mineral species of there.
- Also in Divinity Atlas: Tourmalinated Quartz, mineral species of there.
Sources
1. Quartz (Wikipedia)
Wikimedia FoundationEntity classification (SubLabel)
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
Quartz (Wikipedia), body text
alpha-quartz crystallizes in the trigonal crystal system
View the Source 2. Wikidata: Quartz
Wikidata Q43010Quote, Wikidata Q43010
P279 subclass chain verified to reach rock (Q8063) or mineral (Q7946) within a few hops; identified via Wikipedia pageprops (article title match), PlaybookNote 38526.
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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