Pink chalcedony nodule Rhyolite Sandstone with distinct layering like

Sandstone with distinct layering like this is called ‘picture stone’ because the layers resemble a southwestern landscape

Some of the calcite is exposed and will fluoresce a weak peachy red under 365 nm UV light

The soft matrix on the back can leave light red-brown dusty staining on surfaces

I would love to know more about how these formed

Agate is another form of the quartz family: the term is used to describe chalcedony (a cryptocrystalline form of quartz) that is banded

Pink chalcedony nodule Rhyolite Sandstone with distinct layering likeLocale: Yankee Dog Claim, Hidalgo, New Mexico Approx size: 1. 5" Approx weight: 33g Pink chalcedony nodules, sometimes called "chalcedony desert roses," have been discovered across the southwest. They were prolific from this locale back in the 1990s, but today are much harder to come byat least with any size or quality. The material is known for its strong UV reaction and undulating ropy, botryoidal forms. Pink chalcedony often grows shapes like a