The thundereggs from Poland are another
of the rare thundereggs with colorful agates and they had been well known
in Europe that there are not much rough available (source exhausted?) to
North America right now. The thundereggs tend to be widely fractured, but
there had been finds of thundereggs containg very colorful (often constrasting)
and unfractured agates. The white and orange colors seem to be most common
colors.
