TA89AC5: Aggregate of Smithsonite crystals pseudomorphous after Calcite. The crystals show successive replacement shells indicating that the Calcite was partially replaced, then some more was dissolved and the next layer was attacked. We'll send a copy of the analysis of the Smithsonite to the buyer.
San Antonio Mine (San Antonio el Grande Mine), level 8, East Camp, Santa Eulalia District, Municipio Aquiles Serdán, Chihuahua  Mexico (04/2013)

Specimen size: 16.3 × 9.8 × 7.2 cm = 6.42” × 3.86” × 2.83”

Main crystal size: 3.5 × 2.2 cm = 1.38” × 0.87”