Iceland spar calcite is a very clear, rhombic form of calcite. Place a sample over a line, text or picture and watch the image double. Iceland spar calcite has the same physical properties as all other varieties of calcite including a white streak, low hardness, and glassy to pearly luster.
An information card with details on the mineral formation, 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 crystal shape.
WARNING: CHOKING HAZARD-Small Parts. Not for children under 3 years.
May have sharp edges.