Sandstone arch, extra small Arizona Sierra Siderite some with smoky-quartz coloration

some with smoky-quartz coloration

I detected weak to moderate phosphorescence that lingers several seconds (5+ secs) after exposure to 365nm

Fine brownish siderite has been deposited on one face of the crystals

and light green visible at the edges

then this variety of chalcopyrite is fool's bornite: it borrows its trade name from the closely related mineral bornite

Sandstone arch, extra small Arizona Sierra Siderite some with smoky-quartz colorationLocale: Arizona Approx size and weight 1 32 3 lb, 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 can be called picture stone because the