Sandstone arch, medium Arizona Sierra Ferruginous quartz 5" diameter

5" diameter

Faint agate banding of opaque whiter layers runs through the chalcedony

Many of these specimens are speckled with small pits on the faces

Approx dimensions: 5

Sandstone arch, medium Arizona Sierra Ferruginous quartz 5" diameterLocale: 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