Natural fluorescent calcite crystal cluster from the classic Leiping Mine locality in Hunan, China. The specimen features well-formed blocky calcite crystals with strong transparency and distinct internal reddish zoning caused by natural mineral inclusions. Under shortwave UV light (SWUV), the calcite produces vivid red fluorescence with excellent intensity across the main crystal faces. The strong reaction and internal glow create a striking visual effect, making this piece highly suitable for fluorescent mineral collections and UV display. The crystals show natural luster, sharp geometry, and solid three-dimensional structure on original matrix. The specimen is complete, untreated, and in stable condition, preserving its natural formation features. Leiping Mine calcite is highly valued among collectors for its intense fluorescence and characteristic crystal habit, representing one of the most desirable fluorescent calcite sources in China.