Geode Rocks With Crystals Inside

Geodes are rounded hollow voids in rocks filled with crystals and other minerals.

Geode rocks with crystals inside.

The geode at the left and the one at the top of the page are both dugways from utah. Shells tree branches roots and other organic materials often decay away to leave a void for the formation of mineral materials. Geodes in sedimentary rocks are usually found in limestones dolomites and calcareous shale in these deposits a gas filled void can serve as the opening for geode formation. All geodes are not created equal the first one is quite hollow but for a nice layer of medium sized blue crystals.

The crystals are formed by the filling of vesicles in volcanic and sub volcanic rocks by minerals deposited from hydrothermal. They are typically formed when air bubbles inside of volcanic rock form hollow cavities. Rocks which are completely filled with small compact crystal formations such as agate jasper or chalcedony are called nodules. Simply speaking geodes are hollow rocks that contain an insanely beautiful array of crystal formations inside.

The term geode is derived from the greek word geoides which means earthlike a geode is a round rock which contains a hollow cavity lined with crystals. Geodes derived from the greek word γεώδης meaning earth like are geological secondary formations within sedimentary and volcanic rocks geodes are hollow vaguely spherical rocks in which masses of mineral matter which may include crystals are secluded. The colors come from the different minerals that flowed through the bubble so many millions of years ago.