Sandstone arch, medium Arizona Sierra Chalcedony These minerals have only been

These minerals have only been found in Western Sahara

STAINING WARNING: the black matrix is a bit soft

giving them a faint red glow—try it in a dark room

This piece has ghostly dark spots

or simply unfortunately (or… fortuitously

Sandstone arch, medium Arizona Sierra Chalcedony These minerals have only beenLocale: Arizona Approx size and weight variable by piece; dimensions at end These sandstone arches mimic the grand arches of Utahs national parks. They are made of Arizona Sierra sandstone sourced from central Arizona. Sandstone is a sedimentary rock composed of sand compacted and cemented together through geological processes, giving it a grainy texture. Sandstone with distinct layering like this is often called picture stone because the layers