Iceland Spar

Iceland Spar is a transparent type of calcite mineral known for its unique property of double refraction. When light passes through it, the crystal splits the light into two separate rays, causing objects viewed through the crystal to appear doubled. This optical characteristic was historically used by early explorers in Iceland to determine the polarizing nature of the mineral and understand light polarization. Iceland Spar's clarity and double refraction make it valuable in scientific studies and optical applications. It is also a scientifically significant mineral due to its distinctive structure and properties.