There's a story of a woman named Anatia who supposedly sang like a Calandria bird. She died and her relatives encountered the agates when digging up a grave for her. The agates seem to be similar to those of classic Casas Grandas agates that they could be confused with them since they shared similar appearances (similar sources?) but the Calandria agates have wider variety of colors especially yellow, pink, orange, gray, blue and purple. It's typical to find colorless but strong banded agates among the Calandria agates and not many come with shadowing effects. They're mostly small, but can come in large sizes. Since they showed signs of having been weathered out of their rock hosts,the fractures are expected in most agates.