South America
Sources:
Argentinia
- Province Chubut
- Ayalef
- El Mirador
- Las Plumas
- Piedra Parada
- Province Mendoza
- Rio Colorado
- Province Santa Cruz
- Estanzia Telken
Peru
Argentinia
El Mirador
The source of Mirador or El Mirador is located in an about 240km² area around the monolit called Piedra Parada (Chubut Province). The exact spot is not known but they seem to occur at several places.
The typical thunderegg from that site has a greyish matrix and reddish agate core.
Piedra Parada
The main source at Piedra Parada is the same called one. It is located at a hill containing nearly only of thundereggs.
The material is quite unique, showing a reddish brown matrix with blueish or clear chalcedony fillings.
Rio Colorado
size:
There are a few locations for lithophysae agates in Argentinia. This egg comes from nearby the famous San Rafael area called Rio Colorado (Province Mendoza). It has a nice bi-colored banding in the typical reddish matrix.