2E64: Small disseminated Gudmundite crystals, some of them with well-defined faces and edges, shiny, embedded in Calcite matrix and accompanied by Quartz crystals. This piece will be delivered with a label from the Slovak Mineralogical Society.
Kolársky vrch, Sirková adit, Pezinok, Pezinok District, Bratislava Region  Slovak Republic (04/2017)

Specimen size: 9.4 × 4.5 × 5.3 cm = 3.70” × 1.77” × 2.09”

Main crystal size: 0.6 × 0.2 cm = 0.24” × 0.08”