Anthracite Coal is a black, shiny metamorphic rock. Coal forms from plant material and has no grains. Anthracite is the rarest and most expensive form of coal.
An information card with details on the rock formation, mineral content, characteristics, and uses is included. Typical samples sizes are generally 1-2 inches in length or width but can vary based on availability and natural formation.
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 years.
May have sharp edges.