Sandstone arch, large Arizona Sierra Feldspar If pyrite is fool's gold

If pyrite is fool's gold

I was told that the black matrix is goethite

when exposed to UV light this area of the quartz glows as if more hyalite is trapped inside the point

smoky quartz can't expose you to radiation—even if the hyalite turns "radioactive" green under UV light

but it can range into green or a bold contrast of black

Sandstone arch, large Arizona Sierra Feldspar If pyrite is fool's goldLocale: 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