2E63: 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: 4.0 × 6.3 × 5.0 cm = 1.57” × 2.48” × 1.97”

Main crystal size: 0.1 × 0.08 cm = 0.04” × 0.03”