Sandstone arch, medium Arizona Sierra Chalcedony or simply unfortunately (or… fortuitously

or simply unfortunately (or… fortuitously

with each set cut from adjacent material so that pieces match

This piece has ghostly dark spots

On this point

Sandstone arch, medium Arizona Sierra Chalcedony or simply unfortunately (or… fortuitouslyLocale: 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