Iceland Spar, also known as Optical Calcite, is a striking variety of calcite valued for its polarizing effect on light, a property called birefringence. Historically, it is believed Vikings may have used this mineral to aid navigation on cloudy days. These specimens feature natural clarity and patterns, with unique variations in color and tone. The warm orange hue in these pieces is likely caused by trace amounts of manganese, adding to their visual appeal.
Why You’ll Love This
- Demonstrates birefringence, splitting light into two separate rays for hands-on optical exploration
- Features natural variations in clarity, color, and pattern, making each specimen unique
- Orange tones highlight trace mineral inclusions, showcasing the diversity of calcite formation
- Generous size (approximately 3.5–4 x 3–3.5 x 1.5–2 inches) makes it ideal for display or study
- Combines geological interest with historical relevance, connecting mineral science to Viking exploration
A captivating mineral specimen that blends science, history, and natural beauty for collectors, educators, and curious minds alike.
