Interesting specimen formed by several talmessite aggregates, standing out on the calcite matrix. In order to confirm the species, we carried out a chemical analysis using SEM-EDS, which confirms the presence of Ca and Mg and the almost absence of Co, consistent with talmessite or wendwilsonite. On the other hand, X-ray diffraction confirms talmessite. Performing this structural (XRD) and compositional analysis (SEM-EDS) allows us to delimit the species. Spheroidal aggregates formed by several small crystals. Color and luster are magnificent for the species and contrast on a base of slightly pink calcite (Mn). We'll send a the analysis to the buyer.

 

Size: 7.5 x 4.5 x 4 cm.
Main crystal: 10 x 9 mm. aggr
Found in 2017.

Fluorescent under long wave UV