The Hosszú Hill is potential locality of quartz minerals (opal, chalcedony variants...).
Politically, it is a part of Monok (see there).
Mineral List:16 entries listed. 7 valid minerals.
The above list contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database!