Orange Iceland Spar Mineral Specimen 26990 foramen lacerum

foramen lacerum

showcasing real geological processes

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A threaded steel rod protrudes from the end for attachment to the solid round base

Orange Iceland Spar Mineral Specimen 26990 foramen lacerumIceland 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