Mineral: Opal (variety hyalite), Chalcedony and Quartz
Locality: Monok, Zemplén Mountains, Szerencs District, Borsod-Abaúj-Zemplén, Hungary
Dimensions: 63 mm x 52 mm x 50 mm
Description: The hyalite becomes very green in every type of UV light.
All pictures, text, design © Forum FMF 2006-2024