A rock hound's find is a term used to describe the various types of rocks and minerals that a rock hound or geologist might come across while searching for specimens. The three most common finds are ORE, AGATE, and geode. ORE is a naturally occurring rock or mineral from which a valuable metal or other material can be extracted. AGATE is a type of quartz that is characterized by its banded layers and often found in sedimentary rocks. Geode is a hollow rock with a crystal-lined interior that is often filled with quartz crystals, calcite, or other minerals.