Gneiss is a light gray, black, white, and sometimes pink banded metamorphic rock. The bands form from the heating and squeezing of the original parent rock. Gneiss is pronounced “nice.” The original rock type is typically a granite, arkose, siltstone or sandstone. Gneiss has a medium to coarse-grained texture.
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.