Calcite Butterfly Twin – Potosi Mine, West Camp, Santa Eulalia District, Chihuahua, Mexico
 This aesthetically pleasing specimen features two rare butterfly-shaped calcite twins nestled between wonderfully long, sharp-edged, and lustrous calcite crystals. A phenomenon known as Japanese twins in quartz and extremely rare in calcites, this specimen is a unique specimen that will enhance any collection.
 Rare showcase specimen from the Potosi Mine in Mexico!