Iceland Spar (Clear Calcite) Meanings, Zodiacs, Planets, Elements, Colors, Chakras, and more. Science & Origin of Iceland SparIceland Spar, also known as Clear Calcite or Optical Calcite, is a variety of Calcite that was originally found in Iceland. This mineral is double refractive, meaning objects appearing through it will look as though they're in two places at once.