Flower Calcite – Mina Buena Tierra, Francisco Portillo, West Camp, Santa Eulalia district, Mun. de Aquiles, Serdan, Chihuahua, Mexico
 Collection piece of a "Mariposa" habitus calcite, also called flower calcite.
 The Mariposa habitus is formed by two generations of calcite. The first consists of scalenohedral crystals with a dark iron oxide coating. High-luster, transparent calcites form a flower-like border. The interplay of colors and shapes creates this wonderful variety and makes calcite from the Buena Tierra Mine extremely sought after among mineral enthusiasts.