TX26AL4: Smithsonite as pseudomorphic growths after scalenohedral Calcite crystals. The specimen shows the growth of a successive series of layers that indicate that the Calcite was partially replaced in a first phase, then later ended up being totally replaced by Smithsonite, and with Calcite crystallizing again in a final phase, in the form of small white rhombohedral crystals.
San Antonio Mine (San Antonio el Grande Mine), level 8, East Camp, Santa Eulalia District, Municipio Aquiles Serdán, Chihuahua  Mexico (04/2013)

Specimen size: 4.4 × 2.7 × 3.1 cm = 1.73” × 1.06” × 1.22”

Main crystal size: 2.2 × 1.4 cm = 0.87” × 0.55”