EG46Y8: Doubly terminated crystals of Fluor-Buergerite on matrix. They show a combination of a dominant ditrigonal prism and rhombohedral terminations. The crystals are very bright, have dark a brown, almost black, color with translucent reflections. The sample, from the type locality for the species, is with a label from John. S. White that indicates it previously was in the Luther Thomas collection. We’ll send both labels to the buyer.
The specimen has been photographed and published in the magazine ‘Paragénesis’, number 01/2020, page 62
Municipio Mexquitic de Carmona, San Luis Potosí  Mexico

Specimen size: 6.6 × 5.4 × 3 cm = 2.60” × 2.13” × 1.18”

Main crystal size: 0.8 × 0.5 cm = 0.31” × 0.20”