Trachyte is a white to light gray extrusive igneous rock. Major minerals include feldspar and biotite mica. Trachyte has a porphyritic texture which is mostly fine-grained with many large grains visible.
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.