- Small Cabinet, 7.3 x 5.4 x 4.6 cm
- Santa Eulalia District, Mun. de Aquiles Serdan, Chihuahua, Mexico
These strange and very distinctive calcites were collected in Mexico in the 1940s. Another find was made about 2 years ago, but this is from the old finds. On this specimen, you can clearly see a central twin, enfolded by the dark outer twin.