Mineral: Calcite
Locality: San Bartolo Mine, Charcas, Municipio Charcas, San Luis Potosí, Mexico
Dimensions: 12.6 × 7.8 × 4.6 cm

Description: Main crystal size: 3.6 × 2.6 cm Fluorescence short UV & minor fluorescence long UV Former collection of Uwe Niemeyer

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