Tilburg Summer 2007: Agate geode in Macro

Agate geode with a lot of cristals. Geodes (Greek geoides, "earthlike") are geological rock formations which occur in sedimentary and certain volcanic rocks. Geodes are essentially rock cavities or vugs with internal crystal formations or concentric banding. The exterior of the most common geodes is generally limestone or a related rock, while the interior contains quartz crystals and/or chalcedony deposits.

Canon Eos 350D Tamron Di Macro 90mm

Photo 1 - 5: F32 8-15sec ISO 100