These agates are purchased since the early 1980ies. Questions for the locality were not so preciseley answered with “Paraná, Brazil” - an enormous county in Brazil. These drop-shaped geodes are desired for the contained Quarz-crystallizations inside the nodule. But the agate-collectors are looking for the three different chalcedony-formations inside, wich may appear at the same time:

1. flame- or cloud-agate in reddish or greyish-black colours.

2. banded fortification-agate

3. water-level-agates