What is Fire Agate?

Fire agate is a rare and interesting gem of unusual beauty. It is a brown agate that reflects bright flashes of iridescent yellow, red, orange and green from hemispherical surfaces within the stone. These hemispherical features are a characteristic crystal habit of agate known as […]

Pic of the day #235 (Duplex)

In structural geology, a Duplex is a system of Imbricate (overlapping) thrusts that branch off from a single fault below and merge with a thrust fault above. Duplexes form stacks of thrust-bounded rock bodies, which are bounded by roof and floor thrusts. The rock body that […]