The Hatt Ranch along with several other places such as Yellow Cat River, is one of several rockhounding destinations in Utah where agates, petrified wood and some fossils are found. The "Grape Agates" agate-rimmed agates are generally dug as "mud balls" out of shale/mudstone and many tend to be hollow sometimes lined with red to yellow agates, calcite or barite crystals. Solid banded red to yellow agates are apparently hard to find.