He organised searches in ancient cemeteries, and in August 1966 found such a stone in the Toma Luz sector, Callango district, in Ica Valley. He reported his discovery to the Regional Museum in Ica city, and was accompanied on further expeditions by its curator, the archaeologist Alejandro Pezzia Assereto.
In September 1966 in Uhle Hill cemetery, De la Banda sector, Ocucaje District, they found, for the first time, an engraved stone with certain provenance in a tomb of the Paracas culture.
As a result of weathering, they have developed a thin patina.
It consists of a weathering rind in which weathering has turned some of the feldspar into clay, resulting in a softer material, rated 3 to 4 on the Mohs scale of mineral hardness, which can be scratched.
When a song she's written is made into an Internet video by Austin (Ross Lynch) and becomes a sensation, both his and Ally's lives change dramatically.
In early episodes, Ally continues to struggle with her reticence and stage fright, but with some behind-the-scenes maneuvering by Austin, finds herself onstage, accompanying Austin on piano.
The end result isn't favorable, but the experience helps to solidify the two, and they learn to trust each other.
Ensuing episodes of Austin & Ally find the duo not only increasing their output, but also dealing with the trappings of stardom.
When a far-from-flattering video of Austin shows up on an Internet blog, the resulting controversy not only leads to the cancellation of an upcoming gig, but also forces the group to reassess their strategy.
They are shallowly engraved with a variety of images, some directly incised, others by removing the background, leaving the image in relief.