“… The Ofersbachtal-Valley does not lie far from the Lierbachtal. The agates of Ofersbach are good to differentiate of those of the Lierbachtal. The Rhyolith is substantially brighter, the agates are having the colors white, grey and black. The grey filling (brecciated chalcedony )appears as the same like in the Haigeracher Valley as mixed up mass....”

written by Patricia Hemmer, in “thundereggs from the Black Forest” - catalog to the international agate-fair 2012