25.10 Carat Natural Loose Bicolor Tourmaline Stone Emerald Cut Afghan Gemstone

Mined from the world-famous gem-bearing pegmatites of Afghanistan, this 25.10 Carat Natural Loose Bicolor Tourmaline showcases a monumental display of natural color zoning with a striking, distinct transition between harmonious hues across its crystal body. Precision-crafted into a grand emerald cut, its sleek rectangular profile and parallel step facets create a magnificent "hall-of-mirrors" optical display that emphasizes the gemstone's impressive linear color split. The stone boasts exceptional crystal transparency and eye-clean clarity, allowing light to traverse through its massive interior without dark extinction zones or cloudiness. Completely natural, unheated, and untreated, this monumental 25.10-carat Afghan tourmaline pairs rare collector-grade scale with sophisticated geometric symmetry, making it an extraordinary centerpiece for a high-jewelry statement pendant, an investment exhibition piece, or a world-class gemstone collection.