Byšta Thundereggs
These are never that common - one of those locations that you encounter a few times maybe as the main Slovakian location (compared to the rarer Brezina). They have quite a distinctive yet varied look with a simple agate in blues and greys and a mottled matrix that varies from rich brown to almost white though with similar structures of clumpy inclusions and blotches. The pale ones especially can be really beautiful - striking and unusual thundereggs that deserve to be better known.