This danburite is from Charcas, Mun. de Charcas, San Luis Potosi, Mexico. Mining of the ore bodies in this area began in 1583. The ore bodies contained sulfides of silver, lead and zinc along with other accessory minerals. One of the most famous of these minerals is the outstanding examples of danburite found there. They contain the elements Ca, B, Si, and O. This is a pair of parallel twin crystals with smaller crystals at the base. The smaller crystals that are partially covered with calcite crystals (Ca, C, O). This danburite has a pastel pink color and a glass luster with lightly etched areas. It is a complete crystal that has an excellent termination and it is free from any damage. It is mostly transparent with some internal flaws. This crystal is a small cabinet sized piece that measures 2 3/8 x 7/8 x 5/8 inches or 60 x 22 x 16 mm.