Rich Fluorescent Hackmanite Specimen Specimen - Height: 80 mm - Width: 60 mm - 123 g - (1)

Hackmanite is a rare variety of sodalite known for its distinctive tenebrescence — the ability to change color when exposed to sunlight or ultraviolet light. This specimen’s rich fluorescent qualities make it particularly interesting to mineral collectors, as hackmanite specimens can shift from pale violet or pink hues to deeper purples under different lighting conditions. Found mainly in Greenland, Afghanistan, and the United States, hackmanite crystals form in alkaline igneous rocks. Their fluorescence and reversible color change are caused by specific sulfur-related defects in the crystal lattice. Such specimens provide not only aesthetic appeal but also scientific intrigue, illustrating unique optical phenomena in minerals.