Limestone is a white to gray sedimentary rock formed in the ocean from calcite. Typically, limestone is very fine-grained and will dissolve in acid.
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.