sedimentary

Anthracite Coal

Anthracite coal (High-rank coal)

AI-generated identification · may be incorrect

Hardness: 2.0-2.5; Color: Black to steel-gray; Luster: Sub-metallic to vitreous; Structure: Amorphous (non-crystalline); Conchoidal fracture; Specific gravity: 1.3-1.8

Hardness: 2
Color: Black to steel-gray
Luster: Sub-metallic to vitreous

Identified July 14, 2026More sedimentary →

Explore Anthracite Coal in the encyclopedia →

Identify your own rocks.

Get a report just like this from any photo, free.

App Store Google Play

Physical properties

Hardness: 2.0-2.5; Color: Black to steel-gray; Luster: Sub-metallic to vitreous; Structure: Amorphous (non-crystalline); Conchoidal fracture; Specific gravity: 1.3-1.8

Formation & geological history

Formed through the metamorphic heating and compression of peat and lower-grade coal sedimentary deposits over millions of years, typically during the Carboniferous period.

Uses & applications

Primarily used as a high-grade fuel for domestic heating and industrial power generation; also used in water filtration systems and as a filler in steel production.

Geological facts

Anthracite is the highest rank of coal, containing the most carbon and the least impurities. It burns with a blue flame and produces very little smoke compared to bituminous coal.

Field identification & locations

Identified by its jet-black color, metallic shine, and lack of soot residue when handled compared to other coals. Commonly found in folded mountain belts like the Appalachians.