Sandstone arch, small Arizona Sierra Chalcopyrite It is often cut into

It is often cut into flat slabs to best show the pattern

The specimen is attached to a rock matrix with a few small pockets of malachite

a cluster of white blade-like growth is sprinkled with small double-terminated calcite crystals

a layer of hematite-included calcite is deposited on the surface during a later phase of growth

but the larger crystals on this specimen have enough transparency they may technically be "hematitic" rather than ferruginous

Sandstone arch, small Arizona Sierra Chalcopyrite It is often cut intoLocale: 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