A common iron oxide compound widely found in rocks and soils and mined as an important ore mineral of iron. Its crystals share their structure with corundum, large deposits occur in banded iron formations, and its rusty red streak has served as a pigment since prehistory. 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
Formation ClassOxide mineral (iron oxide), forming across igneous, metamorphic and sedimentary settings and as the principal ore mineral of banded iron formations. 1 Chemical Formula Hardness (Mohs)Commonly cited range is 5.5 to 6.5 on the Mohs scale; 6.0, the midpoint, is used here. Classification
Crystal SystemTrigonal (Rhombohedral) 1 Classification UseOre or Metal Extraction 1 Connections
Associated With
Iron ore minerals such as hematite are a central subject of economic geology's mineral deposit study.
Source Economic Geology (Wikipedia)
Ironstone is a sedimentary rock with a high content of iron oxide minerals, commonly hematite.
Magnetite and hematite are both principal iron oxide ore minerals.
Source Magnetite (Wikipedia)
Hematite named as an important accessory mineral of slate.
Source Slate (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 Hematite (Wikipedia)
In the Other Atlases
- Also in Divinity Atlas: Hematite, mineral species of there.
Sources
1. Hematite (Wikipedia)
Wikimedia FoundationLead section
Hematite, also spelled as haematite, is a common iron oxide compound with the formula Fe2O3 and is widely found in rocks and soils. It is mined as an important ore mineral of iron.
Infobox
Mohs scale hardness: 5.5-6.5
Entity classification (SubLabel)
A common iron oxide compound widely found in rocks and soils and mined as an important ore mineral of iron. Its crystals share their structure with corundum, large deposits occur in banded iron format
Hematite (Wikipedia), infobox
Crystal system: Trigonal
Hematite, live entity-description
mined as an important ore mineral of iron
View the Source Wikidata: Hematite
Wikidata Q103223Quote, Wikidata Q103223
P279 subclass chain verified to reach rock (Q8063) or mineral (Q7946) within a few hops; identified via Wikipedia pageprops (article title match), PlaybookNote 38526.
Slate (Wikipedia)
Wikimedia FoundationAssociated With: Slate, Composition sectionQuote, Associated With: Slate, Composition section
The most important accessory minerals are iron oxides (such as hematite and magnetite), iron sulfides (such as pyrite), and carbonate minerals.
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